In humans, the allele for a widow’s peak is dominant to the allele for a straight hairline. In a family with three children, two of the children have a straight hairline and one child has a widow’s peak. Which of the following is possible?
a. Both parents are homozygous for a straight hairline.
b. Both parents are homozygous for a widow’s peak.
c. One parent is homozygous for a straight hairline, and the other is heterozygous.
d. One parent is homozygous for a widow’s peak, and the other is homozygous for a straight hairline.

Question

In humans, the allele for a widow’s peak is dominant to the allele for a straight hairline. In a family with three children, two of the children have a straight hairline and one child has a widow’s peak. Which of the following is possible?  
a. Both parents are homozygous for a straight hairline.
b. Both parents are homozygous for a widow’s peak.
c. One parent is homozygous for a straight hairline, and the other is heterozygous.
d. One parent is homozygous for a widow’s peak, and the other is homozygous for a straight hairline.

anonymous · Answer

I think its wither c or d? which is it and AM i right?

anonymous · Answer

only c; in case of d you would never get straight hairline

anonymous · Answer

so c?

anonymous · Answer

yes