HSA 2007 Biology Item 9

The allele for attached earlobes (e) is recessive to the allele for unattached earlobes (E). A woman with the genotype (Ee) and a man with the genotype (ee) have a child.

What is the probability that the child is heterozygous for attached earlobes?

1. 0%
2. 25%
3. 50%
4. 75%