Question

justify 'human blood group is an example of co-dominance , complete dominance , multiple allelism ?

Answer 1

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Inheritance pattern of ABO blood groups in humans show dominance , codominance and multiple allelism can be explained as

In dominance, F1 progeny resembles one of the parent. In co-dominance, the F1 progeny resembles both the parentsMultiple alleles: When more than two alleles control a character, as in human blood groupsExample: ABO blood groups in human beingsABO blood groups are controlled by gene I. Gene I has three alleles, I A, I B and i. A person possesses any two of the three alleles. IA and I B dominate over I. But with each other, IA and IB are co-dominant.

IA and I B contain A and B types of sugar, while i does not contain any sugar.



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