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There is a species of frog on an island that puzzles scientists. The proportion of frogs with no stripes is greater than the proportion of frogs with stripes. This is puzzling because the unstriped trait is recessive (s), and the striped patterns are due to dominant alleles (S). Also, natural selection seems to support the striped trait.
How do genetic factors most likely account for the proportion of traits in the frog population?

A. Most of the striped frogs and unstriped frogs have the genotype ss.


B. Most of the striped frogs have the genotype SS and the unstriped frogs have the genotype ss.


C. Most of the striped frogs have the genotype SS and the unstriped frogs have the genotype Ss.


D. Most of the striped frogs have the genotype Ss and the unstriped frogs have the genotype ss.

User Tzima
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1 Answer

3 votes
The answer is D (further explanation in the comments)
User Simon Thordal
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