Question

A widow's peak is a V-shaped area of the hairline in the center of the forehead. The allele for having a widow's peak is dominant to the allele for not having a widow's peak.

If two parents do not have widow's peaks, what is the probability that their child will have a widow's peak?
a. 0%
b. 25%
c. 50%
d. 75%

(PLEASE HELP AND EXPLAIN)!!!

Answer 1

It depends on whether or not the parents are heterozygous for the trait. if they both are, then the child will have a 75% chance of having a widows peak.