Antigens on red blood cells are hereditary traits that allow blood to be typed in different ways.One system is based on a gene with two alleles,M and N.If the frequency of the M allele in a population is 0.4,then according to the Hardy-Weinberg rule,the expected frequency of the heterozygous MN genotype is ________.
A)0)16
B)0)24
C)0)36
D)0)48
E)0)6

Question

Quizplus · Accepted Answer

According to the Hardy-Weinberg rule, the frequency of the MN genotype can be calculated using the equation: 2pq, where p is the frequency of the M allele and q is the frequency of the N allele (p + q = 1). Here, p = 0.4 and q = 0.6 (1 - 0.4). Therefore, 2pq = 2(0.4)(0.6) = 0.48 or 48%. Thus, the expected frequency of the heterozygous MN genotype is 0.48 or 48%. The closest answer choice is D) 0.48.

Antigens on Red Blood Cells Are Hereditary Traits That Allow