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8 March, 21:14

shorthorn cattle may be red, white, or roan in color. the roan is an intermediate coloration due to a mixture of red and white hairs, and is the result of incomplete dominance. a breeder of shorthorn cattle has cows which are white, and a bull which is roan. what proportion of the calves produced in this herd will be white?

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  1. 8 March, 22:53
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    Half or 0.5

    Explanation:

    Let the alleles for the cattle color be R and r. So,

    RR = Red

    Rr = Roan (incomplete dominance)

    rr = white

    When the breeder mates white cow (rr) with roan bull (Rr):

    R r

    r Rr rr

    r Rr rr

    Half or 0.5 of the progeny has rr genotype so 0.5 of the progeny will be white in color.
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