A couple has four children with blood groups | vedclass

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(D) The blood groups of the children are $A, AB, A,$ and $O$.For a child to have blood group $O$ $(ii)$,both parents must contribute an $i$ allele. Th

Vedclass · Accepted Answer

$I^A i$ and $I^B i$

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(D) The blood groups of the children are $A, AB, A,$ and $O$.For a child to have blood group $O$ $(ii)$,both parents must contribute an $i$ allele. Thus,both parents must be heterozygous.For a child to have blood group $AB$ $(I^A I^B)$,one parent must contribute $I^A$ and the other must contribute $I^B$.Combining these requirements,the parents must have genotypes $I^A i$ (Blood group $A$) and $I^B i$ (Blood group $B$).Cross: $I^A i 	imes I^B i$ results in offspring with genotypes $I^A I^B$ $(AB)$,$I^A i$ $(A)$,$I^B i$ $(B)$,and $ii$ $(O)$.Since the children include $A, AB,$ and $O$,the parents must be $I^A i$ and $I^B i$.

$A$ couple has four children with blood groups $A, AB, A,$ and $O$ respectively. What are the genotypes of the parents' blood groups?

Similar Questions

In which of the following can multiple alleles be observed?

In humans,how many genotypes and phenotypes are produced by the three different alleles of the $ABO$ blood group system?

For a person with blood group '$O$',which of the following is not a possible combination of parents' blood group genotypes?

In humans,four phenotypes of blood groups are due to the presence of antigen-$A$ and antigen-$B$ on the $RBC$. The chromosome that carries the gene controlling these antigens is:

On which chromosome are the genes for the $ABO$ blood group located?

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