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) Responses 75% Xx; 25% XX 75% Xx; 25% XX 25% Xx; 75% xx. 25% Xx; 75% xx. 50% XX; 50% Xx 50% XX; 50% Xx 50% Xx; 50% xx.

Answer 1

To create a Punnett square for this genetic cross, we'll denote the father's genotype as xx (he has the autosomal recessive trait, so he does not express the dominant trait) and the mother's genotype as Xx (she has one dominant allele for the trait, so she expresses it).

Here's how the Punnett square would look:

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

Now let's analyze the results within the Punnett square:

• From the cross, we have:
  • 2 squares with genotype Xx
  • 2 squares with genotype xx

The ratios are:

• 50% Xx (autosomal dominant trait expressed)
• 50% xx (autosomal recessive trait expressed)

Thus, the correct interpretation is 50% Xx; 50% xx.

So the appropriate response is 50% Xx; 50% xx.