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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. ...?

Respuesta :

The best and most correct answer among the choices provided by your question is the fourth choice or letter D.

 One parent is homozygous for a widow’s peak, and the other is homozygous for a straight hairline would be possible.

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Answer:

One parent is homozygous for a widow's peak, and the other is homozygous for a straight hairline.

Explanation: