The number of alleles controlling blood groups in humans

Perry_WB

5 years ago

The four main blood groups A, B, AB, and O are controlled by three alleles: A, B, and O.
So I agree with option A

darray

9 years ago

It's three and that's ABO

tochi

1 year ago

The human ABO blood group system is determined by three alleles:
1. IA (A allele)
2. IB (B allele)
3. i (O allele)



Each person inherits one allele from each parent, leading to different blood types (A, B, AB, or O) based on the combination of these alleles.

Roxella

11 years ago

Pls y isnt it 2...?

itz_avon

10 years ago

buh d one i answered before said 4 so how come its 3 all of a sudden