Martha has a widow's peak (dominant trait) and attached earlobes (recessive trait). martha's dad had a straight hairline and unattached earlobes. if martha marries a man that is heterozygous for both traits, what is the probability that they will have a child with a widow's peak and attached earlobes? 1/163/81/41/23/4

3/8

Explanation:

Martha has a widow's peak (dominant trait) and attached earlobes (recessive trait).

Martha's dad had a straight hairline (ww) and unattached earlobes (Ee, because she has the recessive alleles ee and both parents give us one allele).

This tells you that martha has a mother with at least one of both alleles dominant for widow peak and at least one recesive allele of attached earlobes

So, martha's alleles are: Ww and ee.

If she marries a man that is heterozygous for both traits (Ww and Ee) the probabilitys are

Ww Ee x Ww ee: WWEe, WwEe, wWee, and wwee

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