HEREDITY
MULTIPLE ALLELES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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IAIA and IAi
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IA i and ii
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IAIA and IAIA
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IA i and IBi
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Detailed explanation-1: -So, the correct option is ‘IAi, and IBi’.
Detailed explanation-2: -Moreover, when IA and IB are present, both alleles are expressed, and the blood group type is AB. If a child’s blood group is ‘O’, both of the parents should have at least one i allele. Therefore, parents having ‘AB’ and ‘O’ blood group cannot have a child with blood group ‘O’.
Detailed explanation-3: -To have a child with O blood group, both paretns should have atleast one copy of i allele. This means parents with A and B blood group are heterozygous and have genotype IAi and IBi respectively. Parental genotypes IAi and IBi give progeny with 1 IAIB: 1IBi: 1 IAi : 1 ii genotypic ratio. Was this answer helpful?
Detailed explanation-4: -The father with B group can have the genotype IOIB or IBIB . The child with blood group O will have the genotype ii, one from each parent. Hence the father has the genotype IOIB.