Question

Match the columns.

	Column I		Column II
a	Down's Syndrome	p	An additional sex chromosome
b	Cri-du-chat Syndrome	q	Loss of a part of chromosome $5$
c	Klinefelter's syndrome	r	Absence of sex chromosome
d	Turner's syndrome	s	Presence of an extra chromosome
		t	Presence of two extra chromosomes

• A. a-s, b-q, c-p, d-r
• B. a-t, b-s, c-p, d-q
• C. a-s, b-p, c-q, d-r
• D. a-s, b-q, c-r, d-p

Answer 1

The correct option is A a-s, b-q, c-p, d-r

• Down's syndrome is a genetic disorder caused by the presence of all or part of the third copy of chromosome 21.
• Cri-du-chat Syndrome is a genetic condition that is caused by the deletion of genetic material on the small arm (the p arm) of chromosome 5. Infants with this condition often have a high-pitched cry that sounds like that of a cat.
• Klinefelter syndrome is a sex chromosome disorder in boys and men that results from the presence of an extra X chromosome in cells.
• Turner's syndrome is a chromosomal disorder in which a female is born with only one X chromosome.

So, the correct answer is 'a-s, b-q, c-p, d-r'.