A population of dogs can be either brown or black; the black allele (B) has complete dominance over the brown allele (b). Given a population of 2,000 dogs, 1660 black and 340 brown, determine The frequency of individuals with the dominant phenotype.
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To determine the frequency of individuals with the dominant phenotype, we need to calculate the proportion of black dogs (which display the dominant phenotype due to having at least one black allele B) in the population.
Given: Total number of dogs = 2000 Number of black dogs (with the dominant phenotype) = 1660 Number of brown dogs = 340
The frequency of individuals with the dominant phenotype (black dogs) is calculated by dividing the number of black dogs by the total number of dogs:
Frequency of dominant phenotype (black dogs) = Number of black dogs / Total number of dogs = 1660 / 2000 = 0.83
So the frequency of individuals with the dominant phenotype in this population of dogs is 0.83, which can be expressed as 83%