[HPforGrownups] Re: Squibs have genes to do magic?

[Magpie]

No: HPFGUIDX 146466

Jazmun Concolor:
> Squibs are not rare.  Its noted (somewhere in the books)  that more
> squibs are born to purebred families.  Though I bet the Malfoy's would
> have killed off any born in their family.   Even Ron mentions having a
> relitive who is a Squib.  One of the reasons the purebred families are
> dying out, other then marrying non-purebreds is because they are having
> squib children.  Why do you think Neville's grandmother was so concerned
> with knowing he was magical that they would drop him out a window?

Magpie:
Do you have canon for this?  Because while it is a story I can imagine 
working, I don't think this is what the author is saying.  (Fandom tends to 
argue both sides of this idea, sometimes saying purer blood is considered 
stronger by wizards.)  I don't remember Ron saying that Squibs weren't rare, 
and while I remember his reference to an accountant cousin they didn't talk 
about, I actually thought his line about wizards dying out without 
Muggleborn/Muggle blood really was about numbers, not magic being diluted or 
killed off through too much purity.  I definitely don't remember anything in 
the books suggesting Squibs are particularly associated with Pureblood 
families.

JKR's words about magic being dominant and resiliant, imo, were speaking 
exactly against this idea and saying that no, there was no genetic weakening 
or strengthening of magic going on.  Neville's family worrying about him 
was, imo, supposed to just be reflecting Neville's general problem with 
confidence and incompetence, not suggesting Pureblood lines are unstable.

-m