Question

A woman with blood group “O” marries a man with “AB” blood group a)Work out all the possible phenotypes and genotypes of progeny. b)Discuss the kind of dominance in parents and progeny in their case.

Answer 1

There are two possible genotypes for this cross- IA IO and IB IO.

Blood groups are show multiple alleles- IA IB and IO in which IA and IB are dominant over IO.

So,the phenotypes will be A or B

Answer 2

A woman with blood group “O” marries a man with “AB” blood group.

Explanation:

• There are two possible genotypes for this cross- IA IO and IB IO.
• Blood groups are showing multiple alleles- "IA IB" and "IO" in which IA and IB are dominant over IO.
• So, the phenotypes will be A or B.
• The progeny may have "either A or B" as their blood type. The "genes IA and IB" are ruling over the gene IO but are codominant with each other.
• Hence, IAIA/IAIO may result in the ‘A’ blood group, IBIB/IBIO in ‘B’ blood group, IAIB in ‘AB’ blood group and ‘O’ only in IOIO condition.

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A woman with blood group o married a man with ab group. show the possible blood groups of the progeny.list the alleles involved in this inheritance

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