Question

From the cross Aa × Aa, the probability of producing a homozygous dominant offspring is

a. 75%.
b. 50%.
c. 25%.
d. 100%.

Answer 1

Using a punnet square (courtesy of grigore mendel), you will find that crossing Aa Aa creates theoretical offspring that are 25% AA, 50% Aa, and 25% aa.

Hope it helps

Answer 2

I think it is 25%. When you draw a genetic diagram for Aa and Aa the results are AA - homozygous dominant, Aa - heterozygous dominant, Aa - heterozygous dominant and aa - homozygous recessive. So that is 1 out of 4, therefore 25%.