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- #Genetics and Evolution
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- #Class 12
A mother of blood group O has a group O child. The father could be of blood type
A or B or O
O only
A or B
AB only
Answers (1)
If a mother with blood group O (genotype OO) has a child with blood group O, there are several possibilities for the father's blood type. The father could be of blood type O (genotype OO), as both parents passing on an O allele would result in a child with blood group O.
Additionally, the father could also be of blood type A or B, but with certain genotypes. If the father is of blood type A, he could have the genotype AO, where he would pass on either an A or an O allele to the child. If the father is of blood type B, he could have the genotype BO, where he would pass on either a B or an O allele to the child. In both cases, if the father passes on an O allele to the child, the child would have blood group O.
It's important to note that blood type inheritance follows Mendelian principles, where A and B alleles are dominant over O alleles. Therefore, if the father were to have blood type AB (genotype AB), the child could not have blood type O since both A and B alleles are dominant over O. Hence, the correct answer is option 1.
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