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Calculate allele frequency: if there are 40 butterflies in a population and 27 of them are yellow, what is the yellow allele frequency?

User Anefeletos
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It means that the yellow allele/gene is recessive. Since there are fewer butterflies with the yellow appearance. This means that 67.5% of the population of butterflies have the recessive gene/allele.
User VenoMKO
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