Martha has a widow's peak and attached earlobes.Martha's dad had a straight hairline and unattached earlobes.What is Martha's genotype?
A) WWEE
B) WwEE
C) wwee
D) WwEe
E) Wwee

Question

Quizplus · Accepted Answer

Martha has a widow's peak (W) and attached earlobes (e), so her genotype must include at least one dominant allele for widow's peak (W) and two recessive alleles for attached earlobes (ee). Since her dad had a straight hairline (ww) and unattached earlobes (Ee or EE), Martha must be heterozygous for widow's peak (Ww) and homozygous recessive for attached earlobes (ee), making her genotype Wwee.

Martha Has a Widow's Peak and Attached Earlobes