->''"Glynnis, she has a birth certificate, she has my photograph and she has my eyes."''
-->--'''Lord Henry Dashwood''' (brown-eyed Creator/ColinFirth) on his daughter Daphne (green-eyed Amanda Bynes), ''WhatAGirlWants''.

We all know the basic Mendelian model of inheritance; traits are usually either dominant or recessive. Having one copy of a dominant allele means that the person will express the dominant trait, and the only way for someone to express a recessive trait requires having two copies of a recessive allele. Even outside of scientific terms, it's common reasoning that certain traits tend to run in families and we expect relatives to "match" in some way.

These facts are sometimes ignored in Hollywood casting, which can end up having (biological) families looking like just a random group of people. As a result, you'll see blondes having [[ImplausibleHairColor black-haired]] children, biracial people [[FakeMixedRace who look more black/Asian/etc.]] than their black/Asian/etc. parent, [[TeensAreShort inexplicably large discrepancies in height between parents and children]], and so on.

Sometimes families can look so unrelated that it can take focus from the story. "Where did Alice get black hair and brown eyes if Bob and Carol are green-eyed redheads?"

This can even interfere with the plot if a physical resemblance is a plot point (especially in an adaptation when characters get an AdaptationDyeJob or otherwise don't match the physical description of the character in the original work).

There are certain {{justifi|ed trope}}cations; the mechanics behind real life genetic inheritance [[RealityisUnrealistic are more complicated]] than the Mendelian model, which doesn't factor in mutations, malfunctions, and polygenetic traits. Also, casting around to get the most plausible genetics is not always practical--after all, you're not going to turn down Creator/HarrisonFord for a part because his eyes are the wrong color.

On the other hand, you don't have that excuse in non-visual media or in animation where the powers that be have complete control over how characters look. And you could always give Harrison Ford contacts.

Compare IdenticalGrandson, UncannyFamilyResemblance, and PatchworkKids, which can veer too far in the opposite direction. When done intentionally, the dissimilar child is a ChocolateBaby. Also see LegoGenetics, for the ScienceFiction take.
----
!!Examples

[[foldercontrol]]

[[folder:Anime & Manga]]
'''General note before adding examples:'''[[note]] As mentioned in the YouGottaHaveBlueHair article, hair and eye colors in Japanese media are normally chosen to tell characters apart and to match their personalities (e.g. ShyBlueHairedGirl, RedEyesTakeWarning)--combine that with OnlySixFaces and {{Mukokuseki}}, and anime characters having anything notable in common with their families is the exception rather than the rule (although there will be an occasional HereditaryHairstyle). For that reason only aversions or egregious examples should be listed.[[/note]]
* ''{{Dragonball}}'' was fairly realistic in this, especially considering the prevalence of YouGottaHaveBlueHair, and the exceptions are in the vein of UncannyFamilyResemblance rather than this trope.
** Bulma has her mother's blue eyes (not obvious since [[EyesAlwaysShut her mother's eyes are normally closed]]) and her father's purple hair, both of which she passed on to her children Trunks and Bra. Trunks has Vegeta's skin color and eyebrows, while Bra is more or less a clone of her mother.[[note]] In the anime, both Bulma and Bra have blue-green hair, while her father and son retain purplish tones.[[/note]]
** As a little girl, Krillin and Android 18's daughter Marron looks just like Krillin with 18's hair color, including [[TheNoseless having no nose]]. By DragonballGT, she looks just like her mother, and bears little resemblance to her father.
** Gohan looks like both of his parents, while Goten looks exactly like Goku did in the original Dragonball, [[HereditaryHairstyle including his hairstyle]]. Gohan's daughter Pan in turn inherited the shape of her mother Videl's eyes but his eye color.
* ''{{Naruto}}'' averts this in general; if a character has an unusual hair color or facial feature, it's normally accounted for in their family-- in the title character's case, his ImplausibleHairColor and eye color were inherited from his father, while the shape of his face was inherited from his mother. Sasuke and Itachi Uchiha look exactly like their mother Mitoko except for the creases under their father Fugaku's eyes that Itachi inherited. Sakura's [[YouGottaHaveBlueHair pink]] hair was inherited from her father (albeit his is a darker shade), while based on her mother's rather extreme bangs it's obvious who Sakura got her ForeheadOfDoom from.
* Invoked for the merfolk in ''Anime/OnePiece'': due to their unusual biolgy, merfolk carry the genes of all their immediate ancestors, so family members are not even guaranteed to be of the same ''species''. [[http://images2.wikia.nocookie.net/__cb57088/onepiece/images/6/6e/Ryugu_Princes.PNG These three]] are full-brothers. Compare them in both appearance and size to [[http://images3.wikia.nocookie.net/__cb57088/onepiece/images/0/05/Royal_Family.png their sister.]]
* Chibi-Usa from ''Anime/SailorMoon'' generated a ton of WildMassGuessing and FanWank back in the day because her coloration (pink hair, red eyes) was so different from that of her parents (blonde, blue-eyed Usagi and black haired, blue-eyed Mamoru). According to WordOfGod, her coloration was meant to make her resemble a baby rabbit to match her PunnyName. Also, hair colors in [[Manga/SailorMoon the manga]] weren't static--sometimes her mother Usagi was depicted with silver hair and even pink hair in her original design. Usagi herself is the daughter of a purple-haired mother and a black-haired, dark-eyed father and has a brother with light brown hair and dark blue eyes.
* ''Anime/TenchiMuyo'' is a strong aversion, even regarding facial features. In fact, the only character whose look isn't readily accounted for in their family is Tenchi's mother Kiyone (silver hair and gray eyes while her parents have black hair/brown eyes and green hair/yellow eyes), and since she and her parents are two different kinds of HumanAliens, we have no idea how their genetics exactly work anyway.
** Actually ''invoked'' in the main continuity with[[spoiler: Aeka. She was born with curly aqua-green hair like her mother and sister, but later underwent gene manipulation to activate her father's genes for straight purple hair. She wanted her hair to be darker to look more like her black-haired ''step''mother Funaho so she could win the affections of her half-brother/fiancé, Yosho.]]
[[/folder]]

[[folder:Comic Books]]
* DependingOnTheArtist, ''Franchise/{{Spider-Man}}'''s Mary Jane Watson inherited her red hair from her father. Her mother is blonde... which means her mother either dyes her hair or there is a huge elephant in the room, as the older daughter Gayle is a dark brunette. You know, Gayle being the product of an extramarital affair [[WildMassGuessing could partially explain]] why their father was such an AbusiveParent...
* Despite being a clone of Wolverine, Laura Kinney, a.k.a {{X-23}} of ''Franchise/{{X-Men}}'' is portrayed as having similar features to her mother Dr. Sarah Kinney, who while not genetically related to her, carried her to term. Some stories claim that Dr. Kinney used some of her own DNA to stabilize the sample they had from Wolverine since it was damaged (which is the canon reason she's an OppositeSexClone, since the original sample of Wolverine's DNA was apparently missing its Y chromosome), which would partially justify it
* Also from ''Franchise/{{X-Men}}'', [[SuperVillian supervillain]] Vulcan is the black-haired son of brown-haired Corsair and blonde Katherine Summers. The black hair could be part of his mutation, though.
[[/folder]]

[[folder:Films -- Animated]]
* In ''WesternAnimation/TheIncredibles'', Mr. Incredible is blond and Elastigirl is a redhead. Dash has blond hair, Violet has jet-black hair, and Jack-Jack's is strawberry blond/red. Dash's and Jack-Jack's hair colors are plausible. Violet's hair color is not, unless she has some sort of [[AWizardDidIt science-defying mutant superhero hair gene]] (perhaps the gene was not dominant because it's invisible?) or (more likely) hair dye was involved.
[[/folder]]

[[folder:Films -- Live Action]]
* ''Film/HarryPotter'' inherited his mother Lily's GreenEyes, which is a plot point. In the film adaptations, blue-eyed DanielRadcliffe was cast. This is fine in and of itself, since they also cast blue-eyed Geraldine Somerville as his mother, preserving the similarity. However in the film version of ''Film/HarryPotterAndTheDeathlyHallows'', during a flashback which detailed her childhood, the actress cast had deep brown eyes.
* The DVD cover for ''Film/LesMiserables2012'' calls attention to a minor example of this trope. Fantine has brown eyes, while her daughter has deep blue eyes as a child, but green eyes as an adult.
* ''[[TheTerminator Terminator 2]]'' has brown-haired, brown-eyed Edward Furlong play the offspring of blonde, gray-eyed Linda Hamilton and blond, blue-eyed Michael Biehn. It's also a {{retcon}} because Kyle mentions that John has Sarah's eyes.
* Many musicals, especially onstage, will completely drop any attempts at realism and go for color-blind casting, often intentionally casting different races in the role of family members. One of the most memorable examples of this in film is RodgersAndHammerstein's ''Cinderella'' starring Brandi. The king is white, the queen is black, and their son is Asian. And it was completely intentional. You're not supposed to care. In the same film, the WickedStepmother and one of the stepsisters are white, while the other stepsister is black.
* Similarly, KennethBranagh's ''MuchAdoAboutNothing'' casts Denzel Washington as Don Pedro and Keanu Reeves as his brother, Don John (the bastard son of their father). Given both that and the relative quality of their acting, it takes quite the WillingSuspensionOfDisbelief to go along with it.
* ''Film/FreddysDeadTheFinalNightmare'': Red-haired Creator/RobertEnglund and a red-haired mother equals...Latina Elizabeth Peña?
* ''Fireflies In The Garden'' casts RyanReynolds as the grown-up offspring of JuliaRoberts and Willem Dafoe. While this is doubtful, it's not quite as doubtful as the idea of Roberts and HaydenPanettiere being ''sisters'' (and as for Panettiere growing up to look like Emily Watson...).
* In ''Film/FamilyBusiness'' Creator/SeanConnery plays Creator/DustinHoffman's father, while Hoffman in turn is Matthew Broderick's dad. ''Riiiiiiiiiiiiiiiiiiiiiiiiiiiiight...''
[[/folder]]

[[folder:Literature]]
* Similar to the examples in the film series, in ''Literature/HarryPotter'' JK Rowling really didn't pay attention in high school bio. Though magical abilities seem to act recessively (e.g. two non-magical parents can have a magical child), Rowling [[WordOfGod ''says'']] that it's actually dominant and can "become dormant" in certain lineages and resurface later. (This would explain squibs-- muggles from magical families).
** Believe it or not, one fan explained a method, and wrote a [[http://www.themarysue.com/harry-potter-wizard-genetics/ six page biological paper on it.]] It utilizes the mechanism of single nucleotide repeats, the same mechanism for Huntington's disease.
* A plot point in ''Literature/ASongOfIceAndFire''. King Robert Baratheon had black hair and Queen Cersei Lannister is blond and all three of their children are blond as well. [[spoiler: But all of Robert's known bastards are black-haired and every other time their houses have intermarried the children have had black hair so Ned Stark figures out that Cersei's kids were actually sired by [[BrotherSisterIncest her brother]]. It's plausible to put the Baratheon children's paternity in doubt, since having three children in a row with the same recessive trait only expressed by one parent is unlikely, but having a trait stick so tenaciously to one family after centuries of mixed breeding is extremely unlikely. A child has to inherit one allele or another from each parent, even if it isn't expressed.]]
* In many of the ChivalricRomances, Percival has a half-brother with a white father and black mother. The brother is piebald (that is to say, he has light and dark patches of skin like a checkerboard).
[[/folder]]

[[folder:Live-Action TV]]
* A common joke in ''[[SeventhHeaven 7th Heaven]]'' 's Hatedom was LittleMissSnarker Ruthie Camden either being adopted or the product of an affair with the gardener, because Mackenzie Rosman had a noticeably darker complexion and less [[WhiteAngloSaxonProtestant WASP]]y features than the rest of her TV family.
* Dawn Summers from ''Series/BuffyTheVampireSlayer'', was a magically-created clone of her sister Buffy, which would essentially make them identical twins. However, SarahMichelleGellar and MichelleTrachtenberg don't look similar enough to be real life siblings, much less twins.
* [[BigBad Jasmine]] on ''Series/{{Angel}}'' was black; her parents (such as they were), Cordelia and Connor, were not. This is a sci-fi/fantasy show, and she wasn't a human so much as a [[ThePowersThatBe goddess of vast power]] that [[{{Masquerade}} used a glamour at all times to look like that]]. (Her real appearance gave her sickly, green-tinged skin, with [[EldritchAbomination perpetual maggots crawling out of her mouth and eye sockets]].)
* Brown-haired, brown-eyed HollywoodNerd Toby Isaacs on ''[[Series/{{Degrassi}} Degrassi The Next Generation]]'' had a blond, blue-eyed father and a redheaded, green-eyed mother.
* ''Series/{{Dexter}}'' has Rita and ex-husband Paul, both blond. Their kids Astor and Cody have medium to dark brown hair.
* DumbBlonde Kim from ''Series/TheParkers'' is significantly shorter than both her parents (Countess Vaughn is 4'11, Monique is 5'9 and Tommy Ford is 6'4). Lampshaded by an EnfanteTerrible in one episode who, when told by Kim that both her mother and father were tall, responded with MamasBabyPapasMaybe. Kim is also much lighter in complexion than both parents, but due to a great deal of African-Americans having recent white ancestry, this is not as implausible.
* Similar to the above, Sondra and Denise Huxtable, the oldest two daughters from ''Series/TheCosbyShow'' are much lighter than both parents (both of their actresses were biracial). Cliff's father is also very light, which could justify it, but then Cliff himself is ''darker'' than both of his parents. Two children in a row with the same trait that neither parent expresses... makes one wonder what Clair was up to at her law firm.
* In ''Series/DirtySexyMoney'', Juliet has brown eyes while her parents are both blue-eyed.
* Lampshaded on the "Hackidu" episode of ''EverybodyLovesRaymond''. Ray and Debra have dark hair, while the kids have blond hair. Ray trades Ally's $65 "Hackidu" card to Bill Parker, a blond guy. After getting teased for being scammed, Ray decided to get the card back.
-->'''Ray:''' (to Debra) I'm going to go see your boyfriend. (leaves)\\
'''Marie:''' Boyfriend?\\
'''Robert:''' You know, this could explain why all the kids are blond.\\
'''Debra:''' And smart.
* This was an early concern during casting of ''FamilyTies'': Michael J. Fox almost didn't get the role of Alex P. Keaton because the producers at NBC didn't think it was realistic that the 5'4" Fox could be the son of 6'4" Michael Gross and 5'7" Meredith Baxter.
** While it's not really viewed this way by viewers, Meredith Baxter said in an interview that she was surprised to see someone as beautiful, dark and kind of exotic as Justine Bateman being cast with such a white-bread looking family.
* Seemingly averted, but actually played straight in an episode of ''Series/{{House}}''. A patient in an early episode found out that he was adopted because, as he claims, parents without cleft chins can't have a child with one, and the doctors agree with this claim. In fact, such a parent-child scenario ''is'' possible-- [[RealityIsUnrealistic just unlikely]]. Based solely on that trait, the patient shouldn't have been able to tell either way if he was adopted, and Foreman (correctly) explains that while it's unlikely for him to be his parent's child, it's not impossible.
* Justified in ''Series/TheNeighbors''. The Bird-Kersee family consists of father - Larry (British, blond, and Caucasian), mother - Jackie (African-American), older son Reggie (Asian American), and younger son - Dick (Caucasian, american, and red-haired). They are all genetically related, though they are aliens from the planet Zabvron, and could choose their own human appearences. Funny though, because the parents and children don't see why they aren't seen as genetically related by strangers.
* OrphanBlack: In the third episode, [[spoiler: Cosima tells Sarah that clones' fingerprints may be close enough to all match when in reality not even identical twins have the same fingerprints.]] However this may be a case of ArtisticLicense since it's still early in the series.
** Even accepting this premise leaves a PlotHole, unfortunately. [[spoiler: Beth's finger prints would have been put into the system when she became a police officer. If Sarah's arrest happened first, Beth would have had quite some difficulty getting into the police at all. If it happened second, the whole mess should have exploded then. Since only Sarah's fingerprints came up when Katja's were run, it must be that Beth's aren't in the system - presumably the showmakers don't know that police employees' fingerprints always go into the system.]]
* In ''Series/PowerRangersMysticForce'', Udonna, who looks Irish, has a son with Leanbow, who looks Spanish. The kid, Bowen, looks Arabian, with skin about eight shades darker than either of theirs-- a shade fairly close to that of his parents' close friend Daggeron. [[ChocolateBaby No comment is made on this matter.]]
* In ''{{Reba}}'', the redheaded title character and her blond ex-husband Brock have blonde Cheyenne, redheaded Kyra, and... brown-haired Jake? In one episode it's stated that Brock dyes his hair, but it's not made clear if blond was his original color or not.
* ''{{Roots}}'''s Chicken George is the son of Kunta Kinte's daughter Kizzy and her white slave master; he is one of the darkest characters in the series, significantly more so than his mother (and looks about the same age, though that's due to a [[PlayingGertrude different trope]]).
* On ''{{Smallville}}'', half-Dutch, half-Chinese Canadian Kristen Kreuk actor was cast as Lana Lang. Oddly, unlike their version of Pete Ross, there was no RaceLift involved--both her mother and father were portrayed by Caucasian actors. Potentially played with after the reveal that [[spoiler: Lewis Lang isn't her biological father]] but then [[spoiler: when she finds her bio-dad, he turns out to be white, too.]] Many viewers at first sight assume the [[WTHCastingAgency WTH Casting Agency]] was involved.
** Kristen Kreuk has said that ''most'' of her roles involve this, as there are very few roles specifically written to be half Dutch and half Chinese. Still, [[spoiler: putting an Asian actor in Lana's bio dad's role woulda made a lot more sense.]]
* On ''Series/StarTrekTheNextGeneration'', Wesley Crusher has brown eyes when both of his parents have blue. Picard, on the other hand, has brown eyes...
* Several on ''TheVampireDiaries'':
** Stefan and Damon sort of (if you squint) resemble their father, but the two brothers don't resemble each other at all.
** Elena looks very different from her brother and aunt, but then it's revealed that [[spoiler:she was adopted.]] Though it's later played straight when [[spoiler:her birth parents were her father's brother John Gilbert and Isobel Flemming. While you could say she shares some of their facial features, there's no way two pale-skinned light-eyed people could have produced an olive-skinned child with dark brown eyes.]]
** Elijah bears no resemblance to his family either, having much darker features overall. Ironic since [[spoiler:Klaus]], who does match the rest of the family, is supposed to be the illegitimate child.
* Lampshaded in a sadistic Halloween prank in an episode of ''Roseanne,'' where the dark-haired Roseanne and Dan had the dark-haired Darlene and D.J., but a blonde Becky (which isn't as unbelievable as some versions of this.) When their snobby neighbor Kathy Bowman came over, she found Dan lying on the kitchen table, "gutted open" with assorted pieces of raw meat and fake blood sitting on his stomach. Roseanne walks in, covered in blood and holding a dripping knife, and she casually complains that she was so much better at this the last time. When Kathy asks what "last time," Roseanne casually says, "Becky's dad, he was blond, too."
** Averted strongly with the casting of D.J. While neither Sara Gilbert (Darlene), Lecy Goranson, or Sarah Chalke ([[TheOtherDarrin Becky]]) bore a notable resemblance to their TV family, the main reason Roseanne Barr pushed for Michael Fishman to be cast was because he looked like he could be in her family, and even as an adult he looks like her more than her real children. He even played [[CrosscastRole a younger Roseanne]] in flashbacks.
* GoodLuckCharlie: Parents Bob and Amy are blonde and blue-eyed, but their only blonde, blue-eyed kid is PJ. Gabe and Toby are dark-haired with brown eyes. While Teddy and Charlie are blonde, Teddy has brown eyes and Charlie's eyes are either brown or green.
* Series/LivAndMaddie: Both parents are brown-eyed brunettes and their son (Joey) looks like [[{{Victorious}} Robbie Shapiro]] (and Parker, also a brunette, is the Rooneys' answer to Ruthie Camden), so [[SarcasmMode its very plausible that the two daughters are platinum blondes]]. Apparently [[ViewersAreMorons the producers thought no one would notice]].
** Well, blonde hair and green eyes are both recessive traits, so it is technically possible for the twins to have them.
* Actor Yaphet Kotto was cast as Lt. Al Giardello on the award-winning cop series Series/HomicideLifeOnTheStreet, though his dark complexion and facial features made it very implausible for him to be the biracial son of an Italian-American father and an African-American mother. One episode of the series even went out of its way to draw attention to the issue when a light-skinned African-American woman declined to date Giardello because he was "too black" for her. (That said, Kotto was outstanding in the role and it's impossible to imagine another actor playing Giardello. There is a valid argument for colourblind casting.)
* Although many of the families on ''[[Series/TwentyFour 24]]'' look related, a glaring example of this trope pops up in Season 4 with the Secretary of Defense and his daughter (played by William Devane and Kim Raver, respectively). To say they don't look alike is...an understatement.

[[/folder]]


[[folder:Video Games]]
* GaiaOnline, otherwise pretty good about NPC hair colors, retconned Ian into being a vampire in '07, around the time his father Vladimir was introduced (and [[DroppedABridgeOnHim killed]]). Ian's hair has since been recolored black, which he says is his natural color. The problem? Vlad has been confirmed as having dark ''brown'', possibly even auburn, hair, and Ian's late mother Rosalie was a ''blonde''.
* VideoGame/{{Xenogears}} plays with this--because both of her parents are blond (as is everyone else on the FloatingContinent Solaris) and she's a redhead, Elly feels like a literal RedHeadedStepchild to her mother, thinking that her real mother was her red-haired nanny. However, this is both plausible (the way red hair works genetically allows for blonds to be recessive for it) and [[spoiler: a moot point anyway, since the reason she looks like she does is because she is a {{Reincarnation}} of The Anti-Type.]]
* Played oh-so-straight in ''{{Solatorobo}}'', where not only can vastly different races within the species breed freely (foxes with wolves and housecats with lions, for example), but Caninu and Felineko can have children with no problems as well. To top off the Hollywood Genetics, their offspring will be ''either'' Caninu ''or'' Felineko, not some sort of dog-cat hybrid.
* A minor yet noticeable example in ''{{Pokemon Black and White}}'': Cilan, Chili, and Cress are ''triplets'' with different hair and eye colors. Bonus points for each of them having their hair and eyes [[CurtainsMatchTheWindows match each other]] AND their specialty Type all in one.
* Karen is the only girl in ''HarvestMoon64'' who has less than a passing resemblance to her implied grandmother, Eve from [[HarvestMoonOriginalSeries the first title]]. The only resemblance is that Eve has blonde hair, while Karen has blonde... [[MulticoloredHair ba]][[PatchworkKids ngs]].
[[/folder]]

[[folder: Web Comics]]
* Invoked via the musical example in ''KevinAndKell'', where in a production of ''[[Theatre/WestSideStory West Habitat Story]]'' Fiona, a fox, is cast as Maria, while Rudy, a wolf, is cast as Maria's brother. Granted, Rudy does have some fox ancestry in him but he looks and identifies as a wolf. [[spoiler: And it becomes moot when he's recast as Maria's would-be fiancé anyway.]]
[[/folder]]

[[folder:Western Animation]]
* Tony and Megan from ''WesternAnimation/TheAmazingSpiez'' are AmbiguouslyBrown, while neither their parents nor other siblings are.
* In the ''WesternAnimation/AmericanDad'' episode "The Kidney Stays In The Picture", it is revealed that Francine slept with another man right before her and Stan's wedding, meaning Haley may not be his biological daughter. Francine is a brunette who dyes her hair blonde. Stan and Haley both have black hair. The man Francine slept with had brown hair. The one thing Haley and him have in common? [[HereditaryHairstyle A bandana]]. The funny thing is that many viewers would have thought their son Steve would have a different father, due to him having brown hair, but even if Francine was a natural blonde, such an outcome is far from unlikely.
* In ''WesternAnimation/BatmanBeyond'', Terry's mother was a redhead and his dad was blond, but Terry and his little brother had black hair. In the DistantFinale which was also a FullyAbsorbedFinale (the ''JusticeLeagueUnlimited'' episode "Epilogue") it was revealed that [[spoiler:Bruce Wayne is Terry's biological father by way of Cadmus mad science, fixing the whole mess]]. Apparently an AuthorsSavingThrow as a solution to people noting its impossibility (it also helps that Terry's parents already had marital issues that suspected infidelity could have contributed to). Note that it never occurred to anyone to simply suggest that his mother dyes her hair...
* From ''WesternAnimation/DannyPhantom'' Sam Manson has black hair while her father and mother have blond hair and red hair respectively. Someone in the family probably dyes their hair. Given the fact that Sam's a {{Goth}}, it's most likely her.
* ''WesternAnimation/FamilyGuy'' has brown-haired FatIdiot BumblingDad Peter and [[FieryRedhead red-haired Lois]]. Their children are brown-haired ButtMonkey Meg and BrainyBaby Stewie (Stewie Griffin: the Untold Story confirms this) and blond Chris. In and of itself, this is reasonable; Peter could have a recessive blond gene (which will dominate the red). However then we get Bertram, the kids' half-brother on their '''father's''' side. He has red hair, even as a sperm cell. Peter's biological father is red-headed, so he is definitely carrying the genes of red hair for Bertram to inherit, but it's very unlikely that he's masking blond hair, too. The fact that Lois is redheaded means that she most likely only has genes for red hair, so barring a mutation, it can't come from her, either.
* On ''WesternAnimation/TheJetsons'', George and Jane Jetson are both redheads, yet their children Judy and Elroy are both blonde (Judy's being platinum, to be specific).
* In the prequel to Disney's ''Disney/TheLittleMermaid'', both King Triton and his wife have red hair; this means their children can only have red hair, but Ariel is the only redhead among the seven princesses. Either merpeople's dominant and recessive genes are different from humans', or...
** Queen Athena has a blue tail and King Triton's is blue-green. Their daughters' tails are a literal rainbow (red, orange, yellow, sea green, blue, pink and purple).
*** The Broadway stage production is even weirder, since Triton is black, and his daughters are variously Asian, black, and white with a rainbow of different hair colors. And they all have the same color tail, more or less.
* In the ''WesternAnimation/MyLittlePonyFriendshipIsMagic'' episode "Baby Cakes", Mr. and Mrs. Cake (both earth ponies) have twins, who are a pegasus and a unicorn. [[MrExposition Mr. Cake]] [[HandWave hastily explains]] that he has a unicorn ancestor, and Mrs. Cake has a pegasus ancestor, then sheepishly adds [[LampshadeHanging "That makes]] [[GettingCrapPastTheRadar sense, right?"]] While the girl (the unicorn) has the same coloration as Mr. Cake at least, the boy has a completely different color pelt, mane, and eyes.
** What really drives the trope home: Mrs. Cake's pegasus ancestor was her ''great-aunt's second cousin twice-removed.'' Mrs. Cake does not actually share any DNA with this pegasus, yet she somehow passed it on to her son.
* In ''WesternAnimation/SouthPark'', Kenny is blond, his parents have brown hair (his father) and red hair (his mother), and his older brother and younger sister also have brown hair. The reason could be some people have blond hair as children and light brown hair as adults, but as stated before, Karen already has brown hair.
* In Disney's ''Disney/TheHunchbackOfNotreDame'', an interracial OfficialCouple emerged at the end featuring dark-skinned, ethnically Romani Esmeralda and blonde, Caucasian adonis Phoebus. Come 2002, a direct-to-video sequel was released, in which Haley Joel Osment plays Esmeralda and Phoebus' son.. who is a complete carbon copy of his father, equally blonde and white. Dark melanin pigmentation genes are stronger than light ones, and though not entirely dominant, this should result in a skin tone slightly lighter than Esmeralda's. And blonde hair is genetically completely implausible with Esmeralda's dark hair being a dominant gene over the recessive gene of Phoebus' blonde hair.
** In short, the only way to explain the child's completely white appearance is a retroactive RaceLift to Esmeralda, who, ironically, was ''already'' subject to a RaceLift in the original, going from a white girl adopted by Roma in the original book to a born one in the film.
* In the DC Comics-based superhero series ''WesternAnimation/YoungJustice'', the DarkSkinnedBlond teenage superheroine Artemis is the biracial daughter of blond, caucasian supervillain Sportsmaster and the Vietnamese-American reformed supervillain Huntress. While not outright impossible (presumably if there was a blond, caucasian ancestor on her mother's side) Artemis' hair colour is, at best, unlikely. She's [[RealityIsUnrealistic actually based]] on the daughter of one of the show's producers who is half-Korean on both sides (both parents are mixed race) and a natural blonde.
* ''TheSimpsons'': Homer (had brown hair) and Marge (blue hair) have three blonde kids. None of the Bouviers are blonde, and Abe Simpson also had brown hair...
** One episode claims that Bart's natural hair color is ''red.''

[[/folder]]
----