Consider two traits in humans: freckles (F) and widow’s peak (W). Having freckles (F) is dominant over not having freckles (f), and having a widow’s peak (W) is dominant over not having a widow’s peak (w). Suzy is heterozygous for freckles and widow’s peak. José is homozygous recessive for freckles and widow’s peak. Suzy and José are about to have a baby, and they are curious about the likelihood that their child will inherit these traits.
Added by Andrew S.
Step 1
Suzy is heterozygous for both traits, so she can produce two types of gametes: FW and fW. José is homozygous recessive for both traits, so he can only produce one type of gamete: fw. Show more…
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Freckles is dominant to no freckles; widow’s peak is dominant to straight hairline. A man and woman who both have freckles and have widow’s peak have a no freckled, straight hairline child. What are the chances the next child will have the same phenotype as the parents?
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