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25 January, 10:29

A couple has three children, all of whom have brown eyes and blond hair. Both parents are homozygous for brown eyes (B/B), but one is a blond (r/r) and the other is a redhead (R/r). What is the probability that their next child will be a brown-eyed redhead?

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  1. 25 January, 13:21
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    0.5 or 1/2

    Step-by-step explanation:

    Parents BBRr BBrr

    Gametes BR Br BR Br Br Br Br Br

    Offspring BBRr BBRr BBRr BBRr BBrr BBrr BBrr BBrr BBRr BBRr BBRr BBRr

    BBrr BBrr BBrr BBrr

    P (BBRr) = 8/16 = 1/2
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