Harry's looks

[rcraigharman at hotmail.com]

No: HPFGUIDX 18726

--- In HPforGrownups at y..., "Milz" <absinthe at m...> wrote:
> 
> Harry's green eyes could also be explained by gene expression. For 
> Lily to have green eyes, she would have to have had both recessive 
> genes for green eyes (homozygous recessive). James would have had
> to  have the dominant gene and the recessive gene (heterozygous).
> If James were homozygous dominant, Harry would have had dark eyes.

Punnett squares notwithstanding, eye color is determined by a
combination of at least three genes: bey2, on chromosome 15,
(brown/blue), gey on chromosome 19 (blue/green), and bey 1, on
chromosome 15, (central brown eye color).  So, it's a bit more
complicated than a binary trait.

....Craig