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Rowling probably accidentally used the term \
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Rowling probably accidentally used the term \\\"dominant\\\" to describe wizard genes without understanding that the term actually means something very specific in genetics.

That said, the books, and WordOfGod ([[http://harrypotter.wikia.com/wiki/Muggle-born#Origin_of_magical_abilities she stated in an interview that muggleborns have magical ancestry]]), demonstrate that the magic gene is probably recessive (mm), and that squibs result from a dominant mutation (Mm, mM, or MM). True muggles have neither gene at all (00). This is where Rowling\\\'s \\\"dominate\\\" probably comes in: if a wizard and a muggle get together, magic forces the insertion of a full, complete set of the magic gene (mm) into the child\\\'s DNA where otherwise it would have been (0m).

Squibs are shown in the books to be rejects from the magical world (Arabella Fig and Argus Filch are exceptions to the rule, not examples of common practice. Even the Weasleys mention their accountant squib relation that no one talks about).

If a squib carries (mM or Mm, but not MM), then their children on down the line do as well. Though, for all intents and purposes, those descendants are \\\"muggles\\\" they\\\'re really not. They\\\'re squibs. Finally, when two of these squibs eventually get together, they have the possibility of producing a \\\"muggleborn\\\" (mM + mM = mm, mM, Mm, and MM, potentially). That (mm) is a muggleborn witch or wizard.

This explains why Lily was a \\\"muggleborn\\\" witch and Petunia was not magical. More likely, Petunia was shafted with that (mM), or worse, (MM). If (MM), then she need never worry about her Duddikins ever producing a witch or wizard, but if (mM), it\\\'s possible that Dudly might sire a witch or wizard.

Unfortunately, this results in the following:
But Squib (mM) + Wizard (mm) = (mm, mm, Mm, Mm), or 50% chance of producing another Squib, so Wizarding families would be wise to reject their Squibs into the muggle world.

However, none of this supports Pureblood supremacy: Hermione is (mm) ever bit as much as Draco Malfoy is. And if, God Forbid, they had children, those children would be (mm), unless a mutation occurred, causing (mM).
Changed line(s) 1 from:
n
Rowling probably accidentally used the term \
to:
Rowling probably accidentally used the term \\\"dominant\\\" to describe wizard genes without understanding that the term actually means something very specific in genetics.

That said, the books, and WordOfGod ([[http://www.jkrowling.com/textonly/en/extrastuff_view.cfm?id=19 she states on her FAQ that muggleborns have magical ancestry]]), demonstrate that the magic gene is probably recessive (mm), and that squibs result from a dominant mutation (Mm, mM, or MM). True muggles have neither gene at all (00). This is where Rowling\\\'s \\\"dominate\\\" probably comes in: if a wizard and a muggle get together, magic forces the insertion of a full, complete set of the magic gene (mm) into the child\\\'s DNA where otherwise it would have been (0m).

Squibs are shown in the books to be rejects from the magical world (Arabella Fig and Argus Filch are exceptions to the rule, not examples of common practice. Even the Weasleys mention their accountant squib relation that no one talks about).

If a squib carries (mM or Mm, but not MM), then their children on down the line do as well. Though, for all intents and purposes, those descendants are \\\"muggles\\\" they\\\'re really not. They\\\'re squibs. Finally, when two of these squibs eventually get together, they have the possibility of producing a \\\"muggleborn\\\" (mM + mM = mm, mM, Mm, and MM, potentially). That (mm) is a muggleborn witch or wizard.

This explains why Lily was a \\\"muggleborn\\\" witch and Petunia was not magical. More likely, Petunia was shafted with that (mM), or worse, (MM). If (MM), then she need never worry about her Duddikins ever producing a witch or wizard, but if (mM), it\\\'s possible that Dudly might sire a witch or wizard.

Unfortunately, this results in the following:
But Squib (mM) + Wizard (mm) = (mm, mm, Mm, Mm), or 50% chance of producing another Squib, so Wizarding families would be wise to reject their Squibs into the muggle world.

However, none of this supports Pureblood supremacy: Hermione is (mm) ever bit as much as Draco Malfoy is. And if, God Forbid, they had children, those children would be (mm), unless a mutation occurred, causing (mM).
Changed line(s) 1 from:
n
Rowling probably accidentally used the term \
to:
Rowling probably accidentally used the term \\\"dominant\\\" to describe wizard genes without understanding that the term actually means something very specific in genetics.

That said, the books, and WordOfGod (she states on her FAQ that muggleborns have magical ancestry), demonstrate that the magic gene is probably recessive (mm), and that squibs result from a dominant mutation (Mm, mM, or MM). True muggles have neither gene at all (00). This is where Rowling\\\'s \\\"dominate\\\" probably comes in: if a wizard and a muggle get together, magic forces the insertion of a full, complete set of the magic gene (mm) into the child\\\'s DNA where otherwise it would have been (0m).

Squibs are shown in the books to be rejects from the magical world (Arabella Fig and Argus Filch are exceptions to the rule, not examples of common practice. Even the Weasleys mention their accountant squib relation that no one talks about).

If a squib carries (mM or Mm, but not MM), then their children on down the line do as well. Though, for all intents and purposes, those descendants are \\\"muggles\\\" they\\\'re really not. They\\\'re squibs. Finally, when two of these squibs eventually get together, they have the possibility of producing a \\\"muggleborn\\\" (mM + mM = mm, mM, Mm, and MM, potentially). That (mm) is a muggleborn witch or wizard.

This explains why Lily was a \\\"muggleborn\\\" witch and Petunia was not magical. More likely, Petunia was shafted with that (mM), or worse, (MM). If (MM), then she need never worry about her Duddikins ever producing a witch or wizard, but if (mM), it\\\'s possible that Dudly might sire a witch or wizard.

Unfortunately, this results in the following:
But Squib (mM) + Wizard (mm) = (mm, mm, Mm, Mm), or 50% chance of producing another Squib, so Wizarding families would be wise to reject their Squibs into the muggle world.

However, none of this supports Pureblood supremacy: Hermione is (mm) ever bit as much as Draco Malfoy is. And if, God Forbid, they had children, those children would be (mm), unless a mutation occurred, causing (mM).
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