Martha has a widow's peak dominant trait) and attached earlobes recessive trait). Martha's dad had a straight hairline and unattached earlobes. If Martha marries a man that is heterozygous for both traits, what is the probability that they will have a child with a widow's peak and attached earlobes?
A) 1/16
B) 3/8
C) 1/4
D) 1/2
E) 3/4

Question

Quizplus · Accepted Answer

Martha must carry the allele for a straight hairline; her genotype is Wwee and her husband is WwEe. The Punnett square for this cross reveals a 3/8 probability of a child with a widow's peak and attached earlobes.

Martha Has a Widow's Peak Dominant Trait) and Attached Earlobes