In a certain population, the allele frequencies of the M and N blood group alleles are 0.6 and 0.4, respectively. How many of a population of 500 would be expected to have MN blood type if the population is in genetic equilibrium for the MN locus?

A) 200
B) 220
C) 240
D) 260
E) 300

Genetic Equilibrium

The condition of a population that is not undergoing evolutionary change (i.e., in which allele and genotype frequencies do not change from one generation to the next). See Hardy–Weinberg Principle.

Allele Frequencies

The proportion of various alleles of a gene in a population, which can change over time due to evolutionary pressures, genetic drift, mutation, and gene flow.

MN Blood Type

A blood group system classifying human blood based on the presence or absence of the M and N antigens on the surface of red blood cells.