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4 July, 18:00

Feather color in a bird was traced to a single gene. Six variations of feather color could be observed across the bird population. Which of the following could account for so many variations?. A There are two alleles that interact through incomplete dominance ... B Feather color is a polygenic trait ... C Multiple alleles for feather color are present in the population ... D All of the above

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  1. 4 July, 19:54
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    The answer is C Multiple alleles for feather color are present in the population.

    An allele is one of two or more alternative forms of a gene. Since f eather color in a bird was traced to a single gene, the trait is a monogenic and not a polygenic trait (choice b drops off). Further, there are 6 variations of feather color which are controlled by one gene. That means there are 6 variations of the gene. And since the alleles are alternative forms (or variations) of the gene, there are 6 different alleles for feather color.
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