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28 July, 22:22

If skin color were inherited in a simple dominant or recessive pattern, like seed color in pea plants. What would be the genotypes of dark - skinned parents that could produce fair-skinned children?

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  1. 28 July, 22:38
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    the genotypes of both parent would have been heterozygous for the trait.

    Explanation:

    In the simple dominant or recessive pattern as described by Gregor Mendel in the year 1865 involving single gene inheritance. Illustrating this pattern using dark-skinned and fair-skinned people. Assuming dark-skinned to be dominant over fair skinned. the dark skinned parents if both are homozygous for dark skinned would not produce a fair-skinned child but if both are heterozygous for dark skinned, a fair skinned child can be produced. using D to indicte dark-skinned and d to indicate fair skinned, we have:

    genotype DD x DD

    F1 genotype DD

    phenotype dark skinned

    genotype Dd x Dd

    F1 genotype DD Dd dd

    phenotype dark skinned and fair-skinned
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