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Match the following columns.
Column I Column II
A. Down's syndrome (i) An additional sex chromosome
B. Cri-du-chat syndrome (ii) Loss of a part of chromosome 5
C. Klinefelter's syndrome (iii) Absence of sex chromosome
D. Turner's syndrome (iv) Presence of an extra chromosome
(v) Presence of two extra chromosomes
A B C D
1. iv ii i iii
2. v iv ii i
3. iv ii v iii
4. iv ii iii i

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answer is A.

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Detailed Solution

Down’s syndrome	Presence of an extra chromosome
Cri-du-chat syndrome	Loss of a part of chromosome 5
Klinefelter’s syndrome	An additional sex chromosome
Turner’s syndrome	Absence of sex chromosome

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