[HPforGrownups] Re: Wizen recessive gene/Petunia

[Carolina]

No: HPFGUIDX 80321

> Sue B:
> The way I see it is, there were a lot of
> wizards who went "underground" to avoid persecution and married
> out. And then, generations later, the recessive gene springs up
> (my biology is only high school, but I think this would work).
> This is why magical kids turn up in otherwise Muggle families.

I don't think it would work with a simple recesive gene, the last 
time this was discussed, Peg posted this interesting one: 76090, 
playing with this factors:

W=Wizarding gene (magical powers)
w=Nonwizarding gene (no magical powers)
M=Muggle proneness (weakens the expression of the W gene)
m=non-Muggle proneness (no effect on expression of the W gene)
P=Wizarding power (strengthens the expression of the W gene)
p=non-Wizarding power (no effect on the expression of the W gene)

Hope it helps, 
silmariel