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If the blood group of an offspring is O, which of the following is not the correct parental genotypes?

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in Biology – Class 12 by (271k points)
If the blood group of an offspring is O, which of the following is not the correct parental genotypes?

(a) IAIA, IAIB

(b) IAi, IAi

(c) IAi, IBi

(d) ii, ii

This question was posed to me in unit test.

My question is taken from Inheritance Principles topic in chapter Principles of Inheritance and Variation of Biology – Class 12

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Correct option is (a) IAIA, IAIB

The best explanation: The blood group O is encoded by ii. Thus, of the given options, only IAIA, IAIB parental pair cannot produce ii infants.

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