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Solution


Q.

As per ABO blood grouping system, the blood group of father is B+, mother is A+ and child is O+. Their respective genotype can be             [2024]

A. IBi/IAi/ii

B. IBIB/IAIA/ii

C. IAIB/iIA/IBi

D. IAi/IBi/IAi

E. iIB/iIA/IAIB

Choose the most appropriate answer from the options given below.
1 A only  
2 B only  
3 C and B only  
4 D and E only  

Ans.

(1)

If father has blood group 'B', mother has blood group 'A' and the child with blood group 'O' appear in progeny, this means that the parents are heterozygous.
The genotype of the father, mother and child will be IBi, IAi and ii respectively.

Parents Father          x          Mother
Genotype IBi                                    IAi
Gametes IBi                                    IAi
Genotypes of progeny IAIB  IBi                         IAi    ii
Blood groups AB      B                             A      O