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What is the probability of having a child with a certain genotype if the parents are genotypes Aacc and AaCc?

[a] AaCC

[b] aacc

[c] AaCa

[d] aaCc

[e] If A = free-hanging earlobes, a = attached earlobes, C = cleft chin, and c = no cleft chin what are the phenotypes for the above genotypes?

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  • 2 years ago
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    Parents: Aacc and AaCc

    Split in to individual gene:

    Aa x Aa --> 1/4 AA : 1/2 Aa : 1/4 aa

    cc x Cc --> 1/2 Cc : 1/2 cc

    [a] AaCC =1/2 [Aa] x 0 [CC] = 0

    [b] aacc = 1/4 [aa] x 1/2 [cc] = 1/8

    [c] AaCc (not AaCa) = 1/2 [Aa] x 1/2 [Cc] = 1/4

    [d] aaCc = 1/4 [aa] x 1/2 [Cc] = 1/8

    [e] If A = free-hanging earlobes, a = attached earlobes, C = cleft chin, and c = no cleft chin what are the phenotypes for the above genotypes?

    [a] AaCC: - (does not exist)

    [b] aacc: attached earlobes, no cleft chin

    [c] AaCc: free-hanging earlobes, cleft chin

    [d] aaCc: attached earlobes, cleft chin

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