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27 February, 00:43

In cabbage butterflies, white wings are dominant to yellow wings.

A) if a heterozygous winged butterfy is crossed with a recessive winged butterfly, what are the possible genotypes and phenotypes of the offspring AND the percent chance for each? Use "w"

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  1. 27 February, 01:07
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    - Genotypes: 50% (Ww) and 50% (ww)

    - Phenotypes: 50% will have white wings, and the other 50% will have yellow wings.

    - Percent chance: 50% (heterozygous - Ww - yellow) and 50% (homozygous recessive - ww - white)

    Explanation:

    To answer this question, we make a Punnett square which looks like this:

    You cross a heterozygous butterfly (Ww) and a homozygous recessive butterfly (ww), and it gives you:

    Ww ww

    Ww ww

    As you can see from this Punnett square, 2 out of 4 have Ww, which makes it heterozygous and since they have the dominant W trait on them, they result to have white wings. The other 2 have yellow wings, since they have only w on them (recessive trait). Calculate percentages, you get 50% Ww and 50% ww.
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