Write causes, chromosomes composition and symptoms of klinefelter's syndome.

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Solution

Klinefelter syndrome is characterised by the presence of a total of 47 chromosomes instead of 46 due to an extra copy of X chromosome. It may result from the non-disjunction of sex chromosomes during the formation of either male or female gamete. The chromosomal complement of this syndrome is 44 XXY.
Symptoms: Klinefelter syndrome person is phenotypically male with low levels of testosterone, gynaecomastia, reduced body and facial hair and decresed ability or total inability to produce spermatozoa.

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Similar questions

Mark the odd one w.r.t to syndrome which occur due to failure of segregation of homologous pair of chromosomes during cell division cycle

A) klinefelter syndrome

B) down syndrome

C) turner syndrome

D) thalassemia

Assertion [A]: Klinefelter syndrome occurs only in males.

Reason [R]: Klinefelter syndrome is characterised by an additional Y chromosome in the karyotype.

Q. Match the syndromes and chromosomal abnormalities given in columns.

	List I - Syndrome		List II - Chromosomal abnormalities
A	Klinefelter syndrome	p	Trisomy 13
B	Turner's syndrome	q	Trisomy 18
C	Super female	r	44+XXY
D	Patau's syndrome	s	44+XXX
		t	44+XO

Q. Why people with klinefelter syndrome sterile?
Since they have x x y chromosomes what type of gametes can be formed ?

Choose the correct option regarding the Assertion and Reason:

Assertion [A]: Patients having Klinefelter syndrome have higher amounts of estrogen in the body.
Reason [R]: Klinefelter syndrome occurs due to appearance of an extra X chromosome in the human males.

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