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

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

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

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

75% Xx; 25% XX

Answer 1

To determine the likelihood of the autosomal dominant trait being passed on, we can create a Punnett square based on the genotypes of the parents. The father is homozygous recessive (xx) and the mother is heterozygous (Xx).

Here’s how the Punnett square would look:

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

From the Punnett square, we can see the results:

• 50% Xx (heterozygous, showing the trait)
• 50% xx (homozygous recessive, not showing the trait)

Therefore, the correct answer is 50% Xx; 50% xx.