Which of the following statements is true?
A) Two different populations can have the same allele frequency but different genotype frequencies.
B) Populations that are polymorphic have only one allele at a locus.
C) If an allele is fixed in a population, that population is polymorphic.
D) All of the above
E) None of the above

Question

Quizplus · Accepted Answer

Allele frequency refers to the number of copies of a specific allele in a population, while genotype frequency refers to the proportion of individuals in a population with a particular genotype. It is possible for two different populations to have the same allele frequency, but different genotypic frequencies. For example, if there are two alleles at a locus, A and a, with frequencies of 0.4 and 0.6 in one population, the possible genotypes and their frequencies are AA (0.16), Aa (0.48), and aa (0.36). In another population with the same allele frequencies, the genotypic frequencies could be different, such as AA (0.25), Aa (0.50), and aa (0.25).

B) is false; polymorphic populations have more than one allele at a locus.
C) is false because if an allele is fixed, it means there is only one allele at that locus, so the population is not polymorphic.

Which of the Following Statements Is True