19% of a population shows the dominant phenotype. what is the dominant allele frequency?
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19% of a population shows the dominant phenotype. what is the dominant allele frequency?
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When 91% organisms show dominant phenotype that includes both homozygous and heterozygous organisms with 2/1 dominant allele. That means only 9% organisms are homozygous for recessive allele, expressing recessive trait.
According to Hardy Weinberg's law this population would be having 3% frequency for recessive allele (3x3=9) and 7% would be frequency of dominant allele(1-3=7).
This is because frequency of dominant allele plus frequency of recessive allele is ONE and sum of homozygous recessive plus all dominant organisms is 100%.
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