Question

explain multiple alleles and co dominance w.r.t human blood group​

Answer 1

Answer:

Whenever a given trait has three or more different alleles, we say that the trait has multiple alleles. One example of a trait the has multiple alleles is the human ABO blood group trait. ... These three alleles that constitute the ABO blood group trait observe a pattern of inheritance called codominance (co-dominance).

Answer 2

there are 4 blood groups : A, B, AB, O

A and B are co-dominant ie neither of them is expressed when they are together during gametogenesis. Rather AB blood group is expressed when they are together.

Eg- mother has Ia and Ia alleles and the father has Ib and Io.

their child is likely to have AB, A blood group as on fertilisation the resulting combination of genes would be : Ia, Ib ; Ia, Io ; Ia, Ib ; Ia, Ib

since A and B are co dominant and O is never dominant ie it will be expressed only when Io and Io is together....