Humans are in blood group M, N or MN. The alleles for blood group M (M) and blood group N (N) are co-dominant. Humans are also in blood group A, B, AB or O. The alleles controlling these blood groups are IA, IB and i.
If two parents have the genotypes iiMM and IAiMN what is the ratio of possible phenotypes of their offspring?
A. 9 group A, group M 3 group A, group N 3 group O, group M 1 group O, group N
B. 9 group O, group M 3 group O, group N 3 group A, group M 1 group A, group N
C. 3 group O, group M 3 group O, group MN 1 group A, group M 1 group A, group MN
D. 1 group A, group M 1 group A, group MN 1 group O, group M 1 group O, group MN
