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Anime and Manga
- Ranma ½: Herb, Lime and Mint of the Musk Empire are the distant descendants of animals cursed into humanoid women shapes and mated with human males. As a result, they've inherited animalistic traits.
- In One Piece, minor character Chimney is a quarter mermaid through her grandmother, Kokoro. She looks entirely human, but she's a good swimmer.
- In Dragon Ball, Pan is a quarter Saiyan through her grandfather Goku and three quarter human.
- You need a diagram to figure out all the Uneven Hybrids in Tenchi Muyo!. First, we start with Emperor Azusa, who is one half Juraian, one half human. He marries the mostly-human Funahonote , and they have a son, the 1/4 Juraian, 3/4s human Yosho. Later Azusa marries the full-blooded Jurain Misaki and they have two daughters, the 3/4s Juraian 1/4 human Ayeka and Sasami. Yosho disappears and, centuries later, has two daughters, Minaho and Kiyone, who are 1/8 Jurian, 3/8 human, and half Airain (another alien species) from their mother Airi. Kiyone then has Tenchi, who is 1/4 Airian, 1/16 Jurain and 11/16 human. At least. And Tenchi's dad Nobuyuki is also a descendant of Yosho removed by several generations, so he's at least partially Juraian too. The problem here is that there is 700 years of history between Yosho's disappearance on Earth and when the story begins that we just don't know how much has been altered since Yosho's arrival.
- This becomes increasingly common in later Macross series, as humans interbreed more and more with Zentraedi and other humanoid alien species:
- Macross Frontier: Ranka Lee is one quarter Zentraedi. This isn't brought up too often, but it is used to explain why her hair is naturally green, as well as why it moves (apparently a rare Zentran trait). She also chalks up being unharmed by a brief exposure to vacuum to her heritage (Zentraedi have been known to survive up to several minutes in vacuum unprotected).
- Macross Delta: Mirage is also quarter-Zentran (being a granddaughter of Max and Millia from Super Dimension Fortress Macross).
- YuYu Hakusho's Yusuke Urameshi is distantly descended from Raizen, a demon, and a human woman. He's far enough removed from Raizen that his demonic powers don't awaken the first time he dies until it happens again in his battle with Sensui.
- Marry Kozakura from Mekakucity Actors is 1/4 Medusa on her mother's side, and as a result ages slower than a human (she's physically 14 but 140 chronologically) and possesses a weaker version of The Paralyzer power of her mother Shion and grandmother Azami, except hers isn't strong enough to turn people to stone (and the former only managed it at great cost to herself). And while she lacks the actual snake hair of her grandmother it does show Prehensile Hair tendencies and move when she's excited.
- The premise of Nura: Rise of the Yokai Clan is that the protagonist is the heir to a youkai yakuza family but is only one quarter youkai, and three quarters human.
- Angelica from Superior is 1/4 bear demon (represented by having a single demon eye that she keeps hidden behind her Peek-a-Bangs). Her son with Lakshri is 1/8 demon.
- Couvert from Dog Days comes from a race of squirrel people and has a human ancestor several generations back. As a result, she has a second pair of human ears hidden under her hair.
- Isana Konoe from UQ Holder! is implied to be 1/8 tengu. Honoka might be as well, but she hasn't shown the ability to manifest wings.
- Bait and Switch has a minor character named Corpsman Watkins working when Eleya visits sickbay after a battle. Human name, but Eleya's narration says Watkins has some Betazoid blood. In a separate one-shot Challenge Fic starring the same characters, Watkins says the proportion is about a third.
- The Star Trek fanfic Written In The Stars has a Three-Quarter Human Hybrid in Amanda Georgiana Kirk, born of Half-Human Hybrid Spock and full Human Fem!Kirk.
- It's mentioned in the first chapter that Amanda Kirk goes on to marry a human and have a daughter of her own, making Ama's kid a very uneven hybrid (Seven-Eighths Human versus One-Eighth Vulcan).
Film - Live-Action
- At the end of Little Nicky, the title character (half-angel, half-demon) has kids with his human girlfriend, making them half-human, a quarter-demon and a quarter-angel.
Bystander: Such a little angel!
Beefy: Only a quarter, ma'am.
- The Lord of the Rings:
- Aragorn has some elven ancestry a few thousand years prior to the events in the story due to him being the last heir of Gondor. This wasn't really mentioned in the films, however.
- Both Aragorn and Arwen are also part-Maiar, the angelic order of creation, through a shared ancestor who was the mother of Luthien. Although Aragorn after many generations is mainly human, and Arwen is only a quarter or one-eighth human through her own parentage.
- In Dragon Bones, there is Axiel, who is half dwarf, but doesn't look much like it, which results in most people thinking he's talking nonsense when he's drunk and claims to be the dwarf king's son. He's not. Also, the blood line of Hurog contains some dragon blood, which causes the typical blue eyes. Most of them don't even know about it, as it doesn't affect their everyday lives. Oreg, who is quarter dragon, seems to be the only one who can turn into a dragon, though.
- Late in the Labyrinths of Echo series, Max learns that most of his colleagues have non-humans down their bloodlines: Juffin, like most Kettarians, has some werefox blood in him; Shurf is descended from the elves; Melifaro has both dwarven and giant ancestors; Melamori has a lot of elven and faff blood. In fact, the only pure-blooded humans in Secret Investigations are Kofa and Max himself (insofar one disregards his birth in an entirely different world).
- Fleur Delacour and her sister Gabrielle from the Harry Potter series are quarter-Veelas through their grandmother. They lack a full Veela's ability to transform into a harpy-like form, but have inherited the supernatural beauty of their Veela ancestors. Similarly, Professor Flitwick has some distant goblin ancestry.
- The Tates from the Garrett, P.I. novels have a bit of elf blood on both sides of the family, although it's not obvious from their looks.
- The Ohmsford family in the Shannara books. The story starts with the half-elf, Shea, then continues with his descendants, whose elven blood becomes increasingly diluted through intermarriage with humans. Eventually, one of their lines marries back into the elves (Wren is a prominent example), and the main line marries an elf, though the resulting children, Redden and Railing, still consider themselves mostly human.
- In the novels Goblin Moon and The Gnome's Engine, Lord Skelbrooke is strongly implied to have a bit of fey blood. The Duchess is secretly an inversion, with a substantial degree of fey blood from both sides of her family.
- Log Horizon: There is lore about the MMO Elder Tale saying that since the Alvs had a very low population, and since they historically intermarried with humans they've basically become extinct. However Alv genes live on in Humans in the present day. Their genes are plentiful enough that occasionally a Half Alv will be born to a human family due to the Alv genes being recessive.
- Star Trek Novel Verse:
- In the Star Trek: Titan novels Will Riker and Deanna Troi try several times to have children. Deanna miscarries twice, then manages to carry a quarter-Betazoid daughter to term. The Star Trek Online novel The Needs of the Many states in turn that Natasha Riker-Troi married Rene Picard (son of Jean-Luc Picard and Beverly Crusher) and had three children with him.
- Commander Phillipa Matthias, a minor character appearing in the Star Trek: Deep Space Nine Relaunch series, is mostly human with a Vulcan grandfather. She in turn is married to a Bajoran and has two children with him. (Matthias also appears in Star Trek Online as ship's counselor of the Enterprise-F.)
- In the Sabina Kane series humans with red hair have a trace of vampire ancestry. (All vampires have red hair.)
- In the Wild Cards series, Doctor Tachyon's grandson Blaise, who is three-quarters human.
- Mikhail Akhmanov's Arrivals from the Dark series is mainly focused on various descendants of Paul Richard Corcoran, whose mother is impregnated with the seed of a Faata while she is abducted. All of Paul's descendants fit this trope, although not all tend to manifest Faata Psychic Powers and unusually long life (the so-called "Corcoran Curse"). In fact, with each generation, the chances of the latent abilities manifesting are reduced, as the Faata genes get even more diluted by human blood. The Trevelyan's Mission series takes place about 1000 years after the death of Paul Richard Corcoran, and the protagonist eventually finds out that he is one of Corcoran's descendants. By that point, the "Curse" has long been forgotten, as it hasn't manifested itself through Corcoran's countless descendants for a long time. And yes, Ivar Trevelyan ends up developing Psychic Powers himself.
- Both Theirs Not to Reason Why and First Salik War feature several of these thanks to Feyori deliberately breeding their genetics into all possible sentient races over thousands of years.
- The children of Tanis Half-Elven and Laurana in the later Dragonlance books are 3/4 elf, 1/4 human. It's also mentioned that some of the Kagonesti or "Wild" elves have a small amount of human ancestry that Tanis can see in their faces.
- Malazan Book of the Fallen: Though Clip appears to be mostly Tiste Andii, by his own admission he's also part Nerek (who in turn are themselves questionably human), Letherii and D'rhasilhani (which are both human ethnicities).
- Frank Zhang from The Heroes of Olympus is slightly less than half human. His father is the god Mars, but he's also a distant descendant of Poseidon on his mother's side.
- The Mortal Instruments has the fairies, who are half an angel and half a demon. But there are also half-fairies. These are to a quarter an angel, to a quarter a demon, and half a human.
- There are also Mark and Helen Blackthorn, who are the children of a nephilim and a fairy. This makes them a quarter an angel, a quarter a human, and half a fairy.
- Warlocks are the descendants of humans and demons, but Tessa Gray is especially among the warlocks because she is related to the nephilim. She is an angel to a quarter, a human to a quarter, and half a demon.
- Later, she also has two children with another nephilim, and both are a demon to a quarter.
- The German booklet series Maddrax has the mendrites, which are the children of hydrites and humans. Later there is also a whole city, in which humans, hydrites and mendrites have common descendants. As a result, most mendrites have different proportions of human and hydritic DNA. Some of them look almost like humans, while others look almost like hydrites.
- Star Trek: The Next Generation:
- In "The Drumhead", Simon Tarses, an enlisted man in the Enterprise's medical department, is hounded by an admiral on a Witch Hunt on suspicion of being a spy because he has a Romulan grandfather. Tarses had claimed on his entrance application that his grandfather was Vulcannote .
- Worf's son Alexander Rozhenko is one quarter human, from his half-human mother's side.
- Star Trek: Voyager:
- In the backstory to the two-parter "Year of Hell", Annorax's timeship does a Cosmic Retcon to erase the Krenim's rival species, the Rilnar, from history. This proves the undoing of the Krenim Imperium, because Krenim/Rilnar interbreeding in the distant past apparently introduced a crucial antibody to the Krenim genome, which the Cosmic Retcon cancels out. Annorax spends the next while trying to undo his mistake by erasing yet more species from history, which eventually brings him into conflict with Janeway and Voyager.
- In the final season, B'Elanna Torres, a human/Klingon hybrid, gets pregnant by her human husband Tom Paris. Their daughter Miral is born in the series finale. This becomes a problem for a Klingon cult that encounters the Voyager in the Delta Quadrant in the episode "Prophecy". Their leader believes that their sacred scrolls indicate that the as-yet-unborn Miral will lead their people to their promised land (they've been flying around space since Kirk's time and didn't even know that the war was over). However, some of the followers don't look too kindly on the fact that Miral is only one-quarter Klingon.
- In a fourth season episode, Neelix explains that he's not 100% Talaxian as one of his great-grandparents was Mylean.
- In the Stargate SG-1 episode "Space Race" the humans of the planet Hebridan were freed from the Goa'uld by the reptiloid Serrakin many years ago. The two species interbred, resulting in many individuals with varying degrees of human and Serrakin features.
- A major component of The Reveal in the Babylon 5 episode "Atonement". After Jeffrey Sinclair went back in time and became half-Minbari, he married a Minbari and had children. By the present day the number of Minbari with a touch of human ancestry is uncountable, and includes Delenn.
- Mel in Tracker. Her grandfather was supposed to have been Cirronian by Word of God, although it never was officially revealed onscreen before the show was axed. That makes her 3/4 human and 1/4 Cirronian.
- The series Angel has the half-demon Groosalugg. However, he is not really a half-demon, but simply a demon with human ancestors. In a kind of atavism, the human genes have come back to him so that he looks almost like a human being. Unfortunately this was a great disgrace to his folk.
Mythology and Religion
- This is Older Than Dirt. King Gilgamesh from The Epic of Gilgamesh was said to be two-thirds divine, one-third human. How this worked isn't clear; needless to say, they didn't exactly know how genetics worked when that was written.note
- Classical Mythology also gets in on this game with the story of Theseus, the legendary hero (he's the guy who killed the Minotaur) and King of Athens, who was 1/3 god and 2/3 human. Unlike the Sumerians with Gilgamesh, the Greeks thought they had this worked out (though they were charmingly wrong): Aegeus, the childless King of Athens, doesn't understand the Oracle's prophecy on how he would have an heir. On his way home from Delphi, he drops in on his old friend Pittheus, the King of Troezen, who understands the prophecy. He therefore gets Aegeus dead drunk and has his (Pittheus') daughter Aethra seduce Aegeus. Shortly after Aegeus falls asleep, Aethra gets a vision of Athena guiding her to wade across a shallow strait to an island, where Poseidon rapes/seduces her. The result of this night is Theseus, who is reckoned to have two fathers (Aegeus and Poseidon), and therefore be one-third the child of Aegeus, one third of Poseidon, and one-third of Aethra. Descent from Aegeus gave Theseus the right to rule Athens; descent from Poseidon gave him power over the sea—thereby "explaining" why the Athenians were such good mariners.
- Achilles is usually described as the son of a human father and sea nymph, but that is an oversimplification. His father was a paternal descendant of Zeus, giving him and Achilles Olympian and Titan ancestry. In addition to Zeus, a few of Achilles' female paternal ancestors were were nymphs like his mother and some accounts even say his grandfather the centaur Chiron (who mentored him and several other heroes), which gives him quite the heritage. To top it all off Achilles was also the heir to the Myrmidon throne, the Myrmidons were descendants of ants made human by Zeus (but the kings aren't usually said to be descendants of ants themselves, only their subjects).
- Dungeons & Dragons
- In 2nd edition AD&D, products of elf/human interbreeding with claim to 50% or more elven blood always had the characteristics of half-elves, while those with less than 50% elvish ancestry were functionally human.
- The various types of Planetouched are individuals that are mostly a mundane species (human, elf, orc, etc.) but have some blood from an ancestor at least one generation removed who was of extraplanar origin, sometimes even a deity.
- Tieflings are mostly human, but have a fiend somewhere in their ancestry. Aasimar are the celestial equivalent of Tieflings. Genasi have an elemental grandparent instead. In the Forgotten Realms setting in particular there are a lot of tieflings and aasimar in Mulhorand and Unther, since those nations were ruled directly for centuries by avatars of their gods (imported versions of the Egyptian and Sumerian pantheons) who frequently took human concubines.
- Fey'ri are majority-elf, minority-demon crosses.
- Tanarukks are Orcs with fiendish blood.
- In some versions of fluff, sorcerers get their inherent magical powers from a distant ancestor (usually draconic).
- The 3.5E supplement Planar Handbook introduced heritage feats that allowed characters to have a tinge of extraplanar blood, granting various bonuses.
- Pathfinder: Tieflings and aasimar show up again as mortals whose ancestry includes a fiend or celestial, respectively, somewhere way back in their family tree, further divided into various subtypes depending on which specific type of fiend or celestial they trace their ancestry to. Likewise, there also the sylphs, undines, oreads and ifrits, humans whose distant ancestors had children with genies from the elemental planes.
- This is fundamental to how Genestealers infiltrate planets in Warhammer 40,000. Early hybrids are obvious, often having extra arms, claws, scales and so on. Later generations are often able to pass for human with small efforts at disguise, and by the fourth generation they are indistinguishable from real humans. Slightly subverted, however, in that all offspring of a fourth generation hybrid will always be purestrain genestealers so you will never have a hybrid less than 1/16 genestealer.
- Atrus of the Myst games is one-quarter D'ni, making his sons, Sirrus and Achenar, and daughter Yeesha, a local Messianic Archetype, one-eighth.
- Star Trek Online: Admiral D'Vak, a Klingon NPC who commands the USS Houston as part of Star Fleet Battle Group Omega, is the son of Alexander Rozhenko by a Klingon woman according to The Path to 2409. This makes him 1/8 human. Miral Paris from Star Trek: Voyager and Phillipa Matthias from the novelverse also make appearances, and Miral's hybridized genome proves key to curing the Augment virus that ravaged the Klingon Empire from Enterprise through the original series.
- Devil May Cry 4 has Nero, who is implied to be a quarter-demon (with all the perks that come with it like Super Strength). Though his exact parentage went unconfirmed for a while, the story does point out that he has Sparda's blood within him, and one of the artbooks confirmed that he's the son of Vergil.
- In Dragon Ball Online, all human characters were confirmed to be direct descendants of Goku or Vegeta.
- Neverwinter Nights: Hordes of the Underdark has Valen Shadowbreath, a tiefling with very strong demonic blood.
- Neverwinter Nights 2:
- Tieflings (human/fiend) and aasimar (human/celestial) are playable races in the original campaign. Mask of the Betrayer adds four kinds of genasi (human/elemental).
- Original campaign:
- Neeshka, the party's rogue, is a tiefling stated to be 1/4 devil. Mephasm, a pit fiend in the game's recurring cast, makes various suggestions that he's her grandfather.
- Recurring NPC Light of Heavens and her twin Joy are a pair of aasimar (humans with celestial blood) serving Lathander. Light of Heavens is a Divine Champion, while Joy is a dancer.
- Storm of Zehir:
- The background feats "Fey Heritage" and "Fiendish Heritage" allow respectively non-lawful and non-good player characters to have a tinge of fey or fiendish blood. Turns into Heinz Hybrid with half-elves, half-orcs, and planetouched, or if you use them both on a human.*
- Belueth the Calm is a Neutral Evil aasimar rogue who is Only in It for the Money.
- One sidequest has the party investigating the theft of the Hammer of Ironfist by a group of genasi bards. Another has a genasi from Sigil who is gathering items for a museum there.
- Ceodore Harvey in Final Fantasy IV: The After Years is the son of Cecil, a Half-Human Hybrid with a human mother and Lunarian father, and Rosa who is an ordinary woman.
- Throughout the Assassin's Creed series, some Assassin members who can use Eagle Vision are the descendants of Those Who Came Before.
- StarCraft II: The Protoss-Zerg Hybrids come in two varieties: The close-combat Reaver has more zerglike features like external mandibles and huge claws, the Destroyer looks much more like a protoss, with psionic tendrils and psychic abilities.
- The Elder Scrolls
- This is the case for all mixed-race hybrids in the series, averting All Genes Are Codominant. Throughout the series, several in-game books and backstory details indicate that each race of Men (Imperial, Breton, Redguard, Nord) and Mer ("Elves" - Altmer, Dunmer, Bosmer, Orsimer) can indeed interbreed, with the race of the offspring usually being virtually identical to the mother, with a few of the father's traits potentially sprinkled in.note For example, if an Altmer father and Nord mother produce a child, it wouldn't be a Magic Knight combination of each race. Instead, the child would be almost entirely Nord with the potential of having some Altmeri traits, such as slight points to his ears, higher cheekbones, or a slightly different skin tone.
- The Bretons are the most famous hybrid race in Tamriel. Their (human) ancestors were Breeding Slaves to the Direnni Altmer of High Rock. Over the course of many generations, some of the Elven traits started to come through with greater dominance. This has led the Bretons to be the most magically inclined race of Men in Tamriel at the cost of some of the Humans Are Warriors traits of the other races of Men. It still isn't accurate to call the Bretons "half human" hybrids, however. They are still almost entirely human with some Altmeri ancestry. It's noted that some elite noble Breton families still have slightly pointed ears.
- The Bosmer are said to be result of ancient hybridization as well. When the Aldmer (Precursors to all of the modern Elven races) first settled in Valenwood, they started to take "Mannish wives," leading to the modern Bosmer. It is worth noting that out of all the races of Mer, the Bosmer are the ones who look closest to humans and have the most human-like skin tones. In the exact opposite of the Bretons, the Bosmer are still almost entirely Mer.
- Half-elves are prominent in Tales of Phantasia, its prequel, Tales of Symphonia, and related spin-offs. This naturally leads to further interbreeding with their parent races, usually humans. Characters confirmed to have diluted elven blood include Sheena Fujibyashi, whose elven blood allows her to use Summon Magic; Seles Wilder, the daughter of a half-elf and a pure-blooded human; Marta Laudi, whose distant elven ancestry allows her to use magic; Trinicus D. Morrison, the descendent of a famous half-elf; and Lenios, the magic-wielding mayor of Belledam. To note, quarter elven blood and further divisons allow for magic use, but seemingly not longevity that allows Elves and half-elves to live for hundreds of years.
- Ayn's children in Phantasy Star III are destined to be this, as he is half-Layan, and he must marry either a pureblood Layan (Thea) or a pureblood Orakian (Sari); Sean is three-quarters Layan, and Crys is one-quarter. This basically results in Sean having a much more diverse range of techniques at his disposal than Crys.
- This is the way that the mixed-breed monsters in Monster Rancher work - you've got the main breed, which determines what family the monster belongs to, and then the sub breed, which incorporates aspects from that breed and adds them onto the main breed. The original game explains this as being "an X made from a Y" - for example, a Rover/Hare Hound is a Tiger/Hare and has the appearance of a Tiger with long ears instead of horns and the Hare's brown and tan color scheme, while a Pulsar/Blue Hare/Pulscorn is a Hare/Tiger and has the appearance of a Hare with a horn on its head and the Tiger's blue and white colour scheme. Combining monsters usually results in a roulette of LEGO Genetics: the resultant monster could even be a member of one of the parents' sub-breed's families instead of one of the parents' families.
- In Arcanum: Of Steamworks & Magick Obscura, one of the possible backgrounds for a custom human PC is Elven Ancestry, which gives them a higher magical aptitude at the start of the game.
- Fire Emblem
- In Fire Emblem: Blazing Sword, one of Eliwood's potential brides is Ninian, who is half Ice Dragon. This can make his son, Roy, 1/4 dragon. It doesn't come up in either game, though.
- Morgan can be this in Fire Emblem Awakening, but only in the case of a male Avatar marrying the half-Manakete Nah or the female Avatar marrying the half-Taguel Yarne.
- The Avatar of Fire Emblem Fates is half-dragon. This means that their child, Kana, is 1/4 dragon by default, as will any other children they have. Bonus points if the Avatar marries Kaden or Keaton, since it will make Kana 1/4 dragon, 1/4 human and 1/2 Kitsune or Wolfskin, along with their sister Selkie or Velouria.
- In Gunnerkrigg Court, Antimony discovers she's descended from a fire elemental. Aside from giving her access to some magic, she also apparently inherited her mother's "flame" meaning that after Annie was born, she suffered a sort of delayed Death by Childbirth as her vitality was transferred to her.
- In the D&D comic The Order of the Stick the Draketooths were descended from a black dragon and a human. Said black dragon was a relative of the one Vaarsuvius had cast Familicide on in the previous book, which meant the Draketooths were killed too.
- xkcd has scientists creating a hybrid between a spoon and a spork, and proposing that they could create fork/spoon hybrids in other nontraditional combinations. Turns out there are things man was not meant to know about sporks.
- Human mages in Inverloch are descendants of half-elves. Since the races haven't mixed for generations, mages have lost their pointy ears, and gained a lot of redheads as their ancestors kept the blood in the family.
- Brent in Daughter of the Lilies is one-quarter orc, and looks mostly human save for Pointed Ears and pronounced canines. Except when he gets angry, his eyes turn black.
- The Drowolath and Drowussu of Drowtales only rarely intermix, with such unions being discouraged because of their differing cultures, but given that certain physical traits known mostly in one race can show up in the other it's likely there are far more uneven hybrids of the two than anyone really wants to acknowledge. As recounted in the story's prologue the Dutan'vir clan was once largely composed of them, but after their clan fell in a Trauma Conga Line they've largely been scattered. Drowussu uneven hybrids among the Kyorl'solenurn tend to downplay their ancestry, while Drowolath don't seem to care as much. Once such character who's the latter, Kery'awa, is described as having a small amount of 'ssu ancestry that mostly manifests in her curly hair.
- Chakona Space: When Chakats interbreed with compatible species such as wolftaurs or foxtaurs the cubs are usually Chakats with some of their other parent's coloration. Though with newer species like Skunktaurs and Stellar Foxtaurs it depends on which was the mother, and since those species are either Hermaphrodites or Sex Shifters that could be either one of them.
- In Dan Vs., since Chris is 1/16th Canadian. It should be noted that in this series, Canadians are werebears.
- In Ben 10: Alien Force, it is revealed that Gwen and Ben are both 1/4 Anodite, courtesy of their grandmother, Verdona Tennyson. She met Grandpa Max when he saved her from some aliens and she got together with him. Gwen can take advantage of this, Ben apparently cannot.
- In Steven Universe Stevonnie is the result of an accidental Fusion Dance between the half-Gem Steven and fully-human Connie, making them 1/4 Gem and 3/4 human. Any fusion between Steven and one of the full Gems would be 3/4 Gem and 1/4 human, with Smoky Quartz; Steven's and Amethyst's fusion being an example.
- Humans and Neanderthals have been known to interbreed. Today, pretty much every human outside of ancestral Africa has a small percentage of Neanderthal DNA.
- Though male mules are always sterile, despite what Encyclopedia Brown thinks female mules are sometimes fertile. There have been approximately 60 documented cases where female mules have been bred to male horses or donkeys and produced viable foals (which are always either donkeys or horses, depending on the father).
- Bengals are a cat breed produced by breeding a domestic cat with an Asian leopard cat, a type of wild cat. These hybrids are sometimes bred with other, pure domestic cats to produce a more manageable pet. Similarly, the Savannah is a cat breed produced by crossbreeding a serval with a domestic cat. As with the Bengal, the offspring are sometimes bred with full domestic cats.
- The same also sometimes happens with wolves and domestic dogs; people want a dog that looks like a wolf but behaves like a dog. A half wolf, half dog is usually too much for most people, but breeding it with another dog is done to produce dogs that behave more like dogs. Meanwhile in Australia, dingos and domestic dogs frequently interbreed, and there aren't many purebred dingos left. Worth noting, all three animals are technically the same species, Canis lupus, but they're different enough to be considered separate subspecies (the timber wolf is C. lupus lupus, the dog is C. lupus familiaris, the dingo is C. lupus dingo). Wolves have also been known to produce fertile hybrids with a number of other species in the genus Canis; in fact the eastern wolf, C. lycaon, has been theorized to have originated from a timber wolf/coyote cross.
- A liliger is what you get when you cross a female liger with a male lion. There's also a tiliger, which is the offspring of a male tiger and a ligress (female liger).
- Many North American buffalo herds have a small percentage of domestic cattle DNA. In fact, only about four buffalo herds are pure buffalo.
- A wholphin is a cross between a female bottlenose dolphin and a male false killer whale. The first captive wholphin to survive to breeding age, a female, produced three offspring with male bottlenose dolphins, although only one survived to adulthood.
- Dall's porpoises and harbor porpoises interbreed fairly often, and there is at least one documented case of a fertile female hybrid producing offspring with one of its parent species.
- The modern domestic chicken is the many-thousand-generations' Uneven Hybrid descendant of the red junglefowl (Gallus gallus), but with some admixture of grey junglefowl (Gallus sonneratii). The latter ancestry is why chickens have yellow legs rather than black.
- Meanwhile, the actual red junglefowl is in the same boat as the North American bison, having interbred with feral chickens throughout virtually all of its native Asian range. The purest known bloodline is actually being maintained in captivity, having been brought to North America in the early 20th century and kept isolated from domestic fowl.