Question

Here is a pedigree for colorblind (H)What is fred's genotype?

Answer 1

Answer:

$x^{h} y$

Explanation:

Fred has inherited the colorblind trait from his mother. We know this because his spot on the pedigree is filled in. Because he is a male his genotype must be some variation of xy and because he is colorblind he must have the recessive "h" on his x chromosome. So his genotype (genetic type) is $x^{h} y$