Which of the following is an example of a sup | vedclass

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(B) Supplementary genes are a type of gene interaction where one dominant gene produces a specific phenotype,but the second gene (the supplementary ge

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Skin colour of mice

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(B) Supplementary genes are a type of gene interaction where one dominant gene produces a specific phenotype,but the second gene (the supplementary gene) modifies the expression of the first only when present in a dominant state. In the case of skin colour in mice,the gene for agouti colour $(A)$ is dominant over black $(a)$. However,the expression of the agouti colour requires the presence of a dominant gene $(C)$ for colour production. When black mice $(CCaa)$ are crossed with white albinos $(ccAA)$,the $F_1$ generation is agouti $(CcAa)$. This is a classic example of supplementary gene interaction.

Which of the following is an example of a supplementary gene?

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