Answer:
1) aa- affected
2) Aa- unaffected carrier
3) aa- affected
4) aa- affected
5) Aa - unaffected carrier
6) Aa- unaffected carrier
7) aa- affected
8) aa- affected
9) Aa- unaffected carrier
10) aa- affected
11) Aa- unaffected carrier.
This trait is <em>recessive</em>.
The F1 generation has a 50/50 chance of having unaffected offspring.
Explanation:
1) Given
2) Some of the offspring have the trait, and they're not affected, so they have to be a carrier
3) The box is shaded in so they have to have the trait, which means they have to have the same gene pattern as the other affected person (#1)
4) They are also shaded in, so they have to have the trait
5) Since the parents either have the trait or are carriers, if they're not affected they have to be a carrier
6) Same reasoning as #5
7) This is shaded in, the box has to have the trait
8) Shaded in = has the trait/affected
9) Since the parents either have the trait or are carriers, if they're not affected they have to be a carrier
10) Shaded in = has the trait/affected
11) Since the parents either have the trait or are carriers, if they're not affected they have to be a carrier
Since the trait is displayed when the people have two lowercase letters (aa), and people can be unaffected and carriers, (Aa), this trait has to be recessive.
If you make a Punnett Square, you will see that half of the offspring can result in an Aa, while the other half can result in an aa, meaning there's a 50/50 chance of the offspring of the F1 (first) generation will have the trait.
