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Q.

Match the following and choose the correct option.  

AColourblindnessIA missing X chromosome
BKlinefelter’s syndromeIIExtra copy of 21st chromosome
CTurner's syndromeIIIX-linked recessive trait
DDown’s syndromeIVExtra copy of X chromosome

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a

A-III, B-II, C-I, D-IV

b

A-II, B-III, C-I, D-IV

c

A-III, B-II, C-IV, D-I

d

A-III, B-IV,   C-I, D-II

answer is D.

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Detailed Solution

detailed_solution_thumbnail
A-IIIColourblindness is a X-linked recessive trait.
B-IIKlinefelter’s syndrome is due to an extra copy of X chromosome.
C-ITurner's syndrome is due to a missing X chromosome.
D-IVDown’s syndrome is due to an extra copy of 21st chromosome.
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