Answer:
The correct answer would be B-80/200.
Allele frequency is defined as relative occurrence of the allele at a particular locus in a given population.
We have a sample population of 100 chickens where
Frequency of homozygous dominant trait (CC) = 45
Frequency of homozygous recessive trait (cc) = 25
Frequency of heterozygous dominant trait (Cc) = 30
Total alleles would be = 100 x 2 = 200
Total number of observed copies of C (dominant allele) = (45 x 2) + 30 = 120
Similarly, number of observed copies of c (recessive allele) = (25 x 2) + 30 = 80.
Hence, the frequency of allele C = 120/200 = 0.6
Frequency of allele c = 80/200 = 0.4
