Question

A student wants to determine how likely an autosomal dominant trait (X/x) is to be passed on. A father does not have the trait (xx), but the mother does (Xx). What will the Punnett square look like?(1 point)Responses50% XX; 50% Xx50% XX; 50% Xx25% Xx; 75% xx.25% Xx; 75% xx.75% Xx; 25% XX75% Xx; 25% XX50% Xx; 50% xx.50% Xx; 50% xx.

Answer 1

Make a 2×2 square with the mother’s gametes across the top (X and x) and the father’s gametes down the side (x and x):

X | x
-------------
x | Xx | xx
x | Xx | xx

Genotype proportions: 50% Xx (affected), 50% xx (unaffected).