A child has blood group O. If the father | Class 12 Biology Chapter Principles of Inheritance and Variation, Principles of Inheritance and Variation NCERT Solutions

Q12. 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.

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 IB and IB i, have blood group B. The persons with genotype IA IB have 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.

progeny with AB blood group

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

progenies with AB & O blood group

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What is the correct answer to: 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.?

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 individua...

How do you solve 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. step by step?

Step-by-step explanation:
• 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 IB and IB i, have blood group B
• The persons with genotype IA IB have blood group AB while those with blood group O have genotype ii
•

What common mistakes should be avoided in this question?

Students often lose marks by skipping steps, writing incomplete explanations, or misunderstanding keywords used in the question.

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Student Discussion

Srishti
Class · · , · Jun 13, 2019
Thank you
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alanor george steward
Class · · , · Mar 27, 2019
thank u.......
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alanor george steward
Class · · , · Mar 27, 2019
thanks .... seriously this is the very important question .....perhaps this question is being continuously asked for about 5 yrs........
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Deepak
Class · · , · Mar 08, 2019
😀thank u
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