in the pedigree that is shown, which represents irenes allele combination?\n○ $x^{h}x^{h}$\n○…

in the pedigree that is shown, which represents irenes allele combination?\n○ $x^{h}x^{h}$\n○ $x^{h}x^{h}$\n○ $x^{h}x^{h}$\n○ $x^{h}y$

in the pedigree that is shown, which represents irenes allele combination?\n○ $x^{h}x^{h}$\n○ $x^{h}x^{h}$\n○ $x^{h}x^{h}$\n○ $x^{h}y$

Answer

Explanation:

Step1: Analyze the pedigree

We know that the trait seems to be X - linked. Marie has the genotype $X^{H}X^{h}$ and Charles has $X^{H}Y$. Irene is female (represented by a circle).

Step2: Determine possible alleles

Since Irene is female, she has two X - chromosomes. Her father (Charles) has the genotype $X^{H}Y$, so he must pass on the $X^{H}$ allele to her. Her mother (Marie) has the genotype $X^{H}X^{h}$, and she could pass on either $X^{H}$ or $X^{h}$. But since Irene is not affected (assuming the shaded individuals are affected and the trait is recessive), she must have received the $X^{H}$ allele from her mother as well.

Answer:

$X^{H}X^{H}$