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Q.

If a couple who are carriers for sickle cell anaemia, decide to become parents, what will be the odds that their children will also be carriers?

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a

1 out of 4 

b

2 out of 4 

c

3 out of 4 

d

4 out of 4 

answer is B.

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Detailed Solution

The chances of children being carriers is 50%. Both parents have the genotype HbA HbS . The children can have the genotypes-
25%-HbA HbA 
50%- HbA HbS
25%- HbS HbS.

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