[HPforGrownups] Squibs have genes to do magic?

[Jazmyn Concolor]

No: HPFGUIDX 146373



Jen Reese wrote:

>Thinking about Mrs. Figg or Filch doing spontaneous magic later in 
>life made me wonder if that's possible. I thought the whole point of a 
>Squib is that he/she doesn't have magical genes; Even immersing 
>themselves in the magical world as Filch does, how could they suddenly 
>perform magic? Magic is supposedly due to a dominant gene, so it seems 
>like it would be equivalent to changing your eye-color, but then I 
>have a mental block about genetics.
>
>  
>
JK knows NOTHING about genetics.  You can not have 'mudbloods' if its a 
dominant gene.  Its got to be a recessive gene if you can have two 
muggles produce a wizard.  Genetics was my area in college, so I know 
what I am talking about here. 

Very likely because pureblood families produce squibs, then its likely 
that squibs and muggle descended from wizard families are homozygous 
(recessive) for the wizard gene, wizards are heterozygous.   Not all 
muggles carry the gene.  Only those who have wizards somewhere back in 
their ancestry and just the one homozygous carrier might have more then 
one wizard child.   In fact, unless there is a secondary gene that 
nullifies any magic genes, all their kids would be magical.  Meaning 
logically, that there's a chance Lily's mother was either cheating on 
her husband or her sister hated magic so much that she repressed any 
that she might have had or due to a mutation or other gene problem, 
popped up as a carrier and Dudley might turn up with powers later in life.

JK's idea simply does not work.  If Wizard genes were always dominant, 
there would be NO squibs born to purebred families.

Jazmyn