Biology, 22.12.2020 08:30 ayoismeisjjjjuan

John and Marianna are expecting their first baby. John has a widow's peak (dominant allele) hairline while Marianna has a straight hairline (recessive allele). If they have a daughter, she will have a
widow's peak, not a hairline that is indeterminate or a mix between a widow's peak and a straight
line. Why is this so?

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John and Marianna are expecting their first baby. John has a widow's peak (dominant allele) hairline...