Question

How many genotypes and phenotypes are there in ABO blood groups in humans?

• A.

  Genotype	Phenotype
  6	4

• B.

  Genotype	Phenotype
  4	6

• C.

  Genotype	Phenotype
  6	6

• D.

  Genotype	Phenotype
  4	4

Answer 1

The correct option is A

Genotype	Phenotype
6	4

In ABO blood groups the number of genotypes and phenotypes are 6 and 4 respectively.
Genotypes: I${}^A$I${}^A$, I${}^A$i, I${}^B$i, I${}^A$I${}^B$, ii, I${}^B$I${}^B$.
Phenotypes : A, B, AB and O.