Within a population of butterflies, the color brown (B) is dominant over the color white (b). And, 29% of all butterflies are white.
Calculate the frequency of homozygous dominant individuals.
a
42%
b
25%
c
63%
d
22%
To calculate the frequency of homozygous dominant individuals, we first need to find the frequency of the recessive allele (b).
Given that 29% of all butterflies are white (bb), the square root of 0.29 gives us the frequency of the recessive allele (0.538).
Since brown (B) is dominant over white (b), the frequency of the dominant allele (B) is 1 - 0.538 = 0.462.
Now, to calculate the frequency of homozygous dominant individuals (BB), we square the frequency of the dominant allele (0.462)^2 = 0.2142 or 21.42%.
Therefore, the correct answer is 22% (d).