A biology teacher asked the students to find out the blood groups of their family members and make a pedigree chart. After the collection of data the teacher found that one student had parents with blood groups ‘A’ and ‘B’ and his sister had blood groups ‘O’. The students’ blood group was AB. (a) Is it possible to have a child with blood group O if the parents are of A and B blood groups respectively? Give reasons to support your answer. (b) Show the inheritance of blood group ‘AB’.
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Yes it is possible to have a child with blood group o to parents having blood groups A and B.
the blood group is controlled by one gene having three alleles-IA,IB and i
since human is diploid only two allelle can exist.
The parents having child with o blood group must have these following blood group sequence:-
IAi and IBi
when we cross those sequences we get one child with i i allele which codes for O blood group.
and we also get IA IB allele sequence which codes for AB blood group, due to co dominance.
Hope that helps.
the blood group is controlled by one gene having three alleles-IA,IB and i
since human is diploid only two allelle can exist.
The parents having child with o blood group must have these following blood group sequence:-
IAi and IBi
when we cross those sequences we get one child with i i allele which codes for O blood group.
and we also get IA IB allele sequence which codes for AB blood group, due to co dominance.
Hope that helps.
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