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The genotypes of a population of 500 cattle were tested. These analyses showed that Red short-horned...

The genotypes of a population of 500 cattle were tested. These analyses showed that Red short-horned cattle are homozygous for the red allele (R), White cattle are homozygous for the white allele (W), and roan cattle are heterozygotes (RW). 36% of the cattle are red, 16% are white, and 48% are roan cattle. What are the frequencies for the R and W alleles?

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We can also solve this By The Hardy–Weinberg principle...

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