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5 March, 18:59

If a man who is heterozygous for PTC tasting marries a woman who is homozygous recessive, predict the potential genotypes and phenotypes for the offspring for that trait

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  1. 5 March, 19:22
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    Dominant allele - A

    recessive allele - a

    Hetero zygotic for PTC: Aa (expresses the allele)

    Homo zygotic woman: aa (doesn't express it)

    The cross: Aa x aa

    The offspring's probability:

    2/4 = 50% aa (homozygous recessive) - phenotype: feels the bitter taste

    2/4 = 50% Aa (heterozygous) phenotype: doesn't feel the bitter taste of the PTC
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