Punnett squares? Why is my answer 50%, instead of 25%?

Question

In humans, the hypothetical disease Allomentia, is carried on the allele "a", which is recessive to "A" for the normal condition.

Q. The percentage of F2 offspring (generation produced from F1 generation) that are carriers of allomentia is what?

(Figure 1 has Homozygous AA and aa)

(Figure 2 has Heterozygous Aa and Aa)

Answer 1

Please write out the crosses

Answer 2

I'm not sure if you're asking why the correct answer in your text is 50% and you're getting 25% or if you're getting 50% and the text says 25%. (There could be a typo involved here).  But in the second part of the problem, 50% would be the correct answer.

The way the question is worded may be throwing you off. Even though disease is "carried" on the allele "a", a "carrier" is someone who has the allele but doesn't show signs of the disease because they also have the dominant allele "A".  So a carrier is someone who is heterozygous for the trait, or has one of each allele.  I have the feeling you're looking at the offspring that are "aa", not the "Aa".

And for Figure 1, neither 25%, nor 50%, would be correct!