Zoology - Principles of Inheritance and Variation Question with Solution | TestHub

Man with blood group A can be of genotype$I^A{I}^O$or$I^A{I}^A$. If the genotype of man would have been homozygous, then the progeny formed would be:



If the genotype of man would have been heterozygous$I^A{I}^O$then the progeny formed would be:



Thus, it is only progeny with B blood group that can be considered to be sure than man is not homozygous.