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?

Possible Answers:
A. 75%

B. 50%

C. 25%

D. 0%

bot please help

1 answer

The parents in this scenario would both have the genotype of "Ww" (where "W" represents the dominant allele for having a widow's peak and "w" represents the recessive allele for not having a widow's peak).

When these two parents have a child, they each have a 50% chance of passing on either the "W" or "w" allele.

Therefore, the Punnett square for this cross would look like:

| | W | w |
|---|---|---|
| w | Ww | ww |
| w | Ww | ww |

As you can see, there is a 50% chance that the child inherits the "Ww" genotype and therefore has a widow's peak.

Therefore, the answer is B. 50%.