Mr. Andrew, his wife and child belong to blood... | WAEC SSCE - Biology - 2010 (Objective)

Question 1 Report

Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are

I^A I^O and I^B I^B

I^A I^A and I^B I^B

I^A I^B and I^A I^O

I^A I^O and I^B I^O.

Answer Details

Since Mr. Andrew's blood group is A, he could have the genotype IA IA or IA IO. Similarly, since his wife's blood group is B, her genotype could be IB IB or IB IO. Their child's blood group is O, which means the child must have the genotype IO IO. Therefore, the possible genotypes of both parents are IA IO and IB IO, as they are the only combinations that can produce a child with the genotype IO IO.

Read lesson note on Nitrogen Cycle (WAEC)

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Nitrogen Cycle

Genetic Terminologies

Sense Organs (Nose, Tongue & Skin)

Reproduction (Courtship Behaviour In Animals)

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Mr. Andrew, his wife and child belong to blood groups A, B and O respectively. The genotypes of both parents are

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