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Choose the set of incorrect statements from the following with reference to human.
(a)’Y’ chromosome has male sex determining factor.
(b) ‘X’ chromosome has gene for colour vision.
(c) Largest known gene codes for dystrophin.
(d) Sequencing of Chromosome 1 was completed in May 2003.
(e) Klinefelter’s syndrome is due to fertilisation of an abnormal ovum by a normal sperm with ‘X’ chromosome.

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b, d, e

a, b, c

a, d, e

d ,e only

answer is D.

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Detailed Solution

Sequencing of first chromosome was completed in May 2006. Klinefelter’s syndrome is due to fusion of abnormal ovum (XX) with ‘Y’ sperm or normal ovum (X) with abnormal sperm (XY).

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