Question

A widow's peak hairline is dominant (W) to a straight hairline (w). Karen and her brother both have a straight hairline, but her parents and sister all have a widow's peak. Complete the Punnett square that shows Karen's family.

Answer 1

Answer is below

Step-by-step explanation:

Answer 2

Both of Karen's parents have a widow's peak, but she doesn't. That means that both parents must have the recessive allele, but as they have the dominant phenotype, that means they are heterozygous (Ww).

In this case, the Punnett's square would be as follows: