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? (1 point)
The parents must both be heterozygous for the widow's peak trait in order for their child to have the possibility of inheriting a widow's peak. Therefore, the parents each have the genotype Ww.
When these parents reproduce, they can produce offspring with the following genotypes:
- WW (no widow's peak)
- Ww (widow's peak)
- Ww (widow's peak)
- ww (no widow's peak)
There is a 2 out of 4, or 50%, chance that their child will have a widow's peak.