What are the allelic frequencies

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What are the allelic frequencies

The European land snail, Cepaea nemoralis, exhibits 3 phenotypes in shell color brown, pink and yellow. Shell color is controlled by one gene that has only two alleles. Brown is dominant to yellow and pink is the heterozygous condition. In one population of 520 snails, the following color phenotypes were recorded: 236 brown, 231 pink and 53 yellow. What are the allelic frequencies?

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