AGB-0082
QUESTION
In complete dominance, the population mean is proportional to the?
OPTIONS
(A) Gene frequency
(B) Square of the gene frequency
(C) Genotype frequency
(D) Both gene and genotype frequency
ANSWER
(A) Gene frequency
EXPLANATION
Under complete dominance, the population mean for a trait determined by the relevant locus depends on allele frequencies because the frequencies of homozygous and heterozygous genotypes are functions of those allele frequencies. The statement is conventionally expressed as being proportional to gene frequency under the simplified genetic model used in the question; it is not simply proportional to the square of gene frequency alone.