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Vinil7 [7]
3 years ago
12

The presence of a widow's peak (pointed hairline on forehead) is inherited in a dominant manner. If two people who are heterozyg

ous for widow's peak have children, what is the expected phenotypic ratio of their offspring
Biology
1 answer:
Kaylis [27]3 years ago
7 0

Answer:

widow's peak children = 3/4

no widow's peak children = 1/4

Explanation:

Widow's peak is a dominant trait. Assuming that the gene that controls the trait is represented by the allele A, the alternate form (no-widow's peak) would be a.

If two people who are heterozygous have children:

                              Aa   x   Aa

                        AA    Aa    Aa    aa

widow's peak = 3/4

no widow's peak = 1/4

<em>the expected phenotypic ratio of the offspring would be 3 to 1 widow's peak to no-widow's peak.</em>

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National Geographic Logo - HomeSKIP TO CONTENT

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Grizzly bear

Grizzly bears once lived across much of western North America until European settlements and aggressive hunting eliminated most of the population.

PHOTOGRAPH BY JOEL SARTORE, NATIONAL GEOGRAPHIC PHOTO ARK

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