Question

The number of phenotypes and genotypes of blood groups in human beings are

• A. 4 phenotypes and 4 genotypes
• B. 6 phenotypes and 6 genotypes
• C. 6 phenotypes and 4 genotypes
• D. 4 phenotypes and 6 genotypes

Answer 1

The correct option is D

4 phenotypes and 6 genotypes

Blood group in human beings have four phenotypes namely A, B, AB and O. Blood group A has two genotypes ($I^A{I}^A,I^{A}i$), blood group B has two genotypes ($I^B{I}^B,I^{B}i$) and blood group AB $\left(I^A{I}^B\right)$ and O (i i) have one genotype each. Thus adding upto 6 genotypes.