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A Child Has Blood Group O. If the Father Has Blood Group a and Mother Blood Group B, Work Out the Genotypes of the Parents and the Possible Genotypes of the Other Offsprings - Biology

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ConceptInheritance of One Gene Introdution of Inheritance of One Gene

Question

A child has blood group O. If the father has blood group A and mother blood group B, work out the genotypes of the parents and the possible genotypes of the other offsprings.

Solution 1

The blood group characteristic in humans is controlled by three set of alleles, namely, IA, IB, and i. The alleles, IA and IB, are equally dominant whereas allele, i, is recessive to the other alleles. The individuals with genotype, IA IA and IA i, have blood group A whereas the individuals with genotype, IB IBand IB i, have blood group B. The persons with genotype IA Ihave blood group AB while those with blood group O have genotype ii.

Hence, if the father has blood group A and mother has blood group B, then the possible genotype of the parents will be

Father Mother

IA IA or IA i IB IB or IB i

A cross between homozygous parents will produce progeny with AB blood group.

A cross between heterozygous parents will produce progenies with AB blood group (IAIB) and O blood group (ii)

Solution 2

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APPEARS IN

 NCERT Solution for Biology Textbook for Class 12 (2018 to Current)
Chapter 5: Principles of Inheritance and Variation
Q: 12 | Page no. 93

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Solution A Child Has Blood Group O. If the Father Has Blood Group a and Mother Blood Group B, Work Out the Genotypes of the Parents and the Possible Genotypes of the Other Offsprings Concept: Inheritance of One Gene - Introdution of Inheritance of One Gene.
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