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)

Question

Responses

50% XX; 50% Xx
50% XX; 50% Xx

25% Xx; 75% xx.
25% Xx; 75% xx.

75% Xx; 25% XX
75% Xx; 25% XX

50% Xx; 50% xx.
50% Xx; 50% xx.

Answer 1

To determine the inheritance pattern of the autosomal dominant trait, we can set up a Punnett square based on the genotypes of the parents.

The mother’s genotype is Xx (she has the dominant trait) and the father’s genotype is xx (he does not have the trait).

Setting up the Punnett square:

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

From this Punnett square, we can see the possible offspring genotypes:

• 50% Xx (inheriting the dominant allele from the mother)
• 50% xx (inheriting the recessive allele from both parents)

Thus, the correct response is:

50% Xx; 50% xx.