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25 March, 23:33

Chickens with shortened wings and legs are called, creepers. When creepers are mated to normal birds, they produce creepers and normal progeny with equal frequency. When creepers are mated to creepers, they produce two creepers to one normal progeny. What mode of inheritance can explain these results?

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  1. 25 March, 23:54
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    assuming the

    1. Cc represent creepers (since creepers never breed true this is the likey representation,)

    2. nn represents normal.

    If these are crossed the F1 progeny are;

    Cn and Cn = creeper

    nc and nc = normal 50/50 % ratio.

    However. if the two creepers (Cn and Cn) from above are self-crossed in the F2 to give two creepers and a normal progeny. The creeper traits is expected to be dominant; while the recessive to be lethal, The normal birds nn, is expected to be homozygous recessive for the trait.
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