question_answer 22)

  For the MN-blood group system, the frequencies of M and N alleles are0.7 and 0.3, respectively. The expected frequency of MN-blood group bearing organisms is likely to be (a) 42%                                 (b) 49%                                 (c) 9%                                    (d) 58%

Answer:

                  (a) The expected frequency of MN blood group bearings organisms is likely to be 42%. According to Hardy-Weinberg equation, where, p = Frequency of M alleles, = Frequency of homozygous dominant individuals. q = frequency of N alleles  = Frequency of homozygous recessive individuals. 2Pq = Frequency of heterozygous individuals. So,          Frequency of heterozygous individual isi.e., 42%