7 Pedigree

The inheritance pattern for an autosomal dominant trait is

shown in the pedigree. Shaded symbols represent

individuals that express the dominant trait.

Based on this pedigree, what are the most likely

genotypes of individuals I-1 and I-2?

II

A

I-1: aa

1-2: Aa

B

I-1: AA

1-2: Aa

С

I-1: Aa

I-2: aa

D

I-1: aa

I-2: AA