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

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

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

25% Xx; 75% xx.

Answer 1

To determine the likelihood of the autosomal dominant trait being passed on from the given parental genotypes, we can set up a Punnett square.

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 genotypic ratios:

• 50% Xx (heterozygous, with the trait)
• 50% xx (homozygous recessive, without the trait)

So the correct response is: 50% Xx; 50% xx.