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Turner Syndrome

Assertion [A]...

Question

Assertion [A]: Turner syndrome occurs only in females.

Reason [R]: Turner syndrome is characterised by only one X chromosome.

A

Assertion [A] is true and Reason [R] is false

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B

Reason [R] is true and Assertion [A] is false

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C

Both [A] and [R] are true and [R] is the correct explanation for [A]

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D

Both [A] and [R] are true but [R] is not the correct explanation for [A]

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Solution

The correct option is C Both [A] and [R] are true and [R] is the correct explanation for [A]
Turner syndrome arises due to abnormalities in sex chromosomes. The factors leading to Turner's syndrome are:

Inheritance of only one X chromosome from parents.

Inactivation of gender-related part of X-chromosome.

Instead of the normal 44+XX chromosomal condition, women suffering from Turner syndrome show 44+XO condition. They are sterile, i.e., they are unable to have children due to improper growth of the reproductive organs.

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Similar questions

Choose the correct option regarding the Assertion and Reason:

Assertion [A]: Turner syndrome occurs only in females.

Reason [R]: Turner syndrome is characterised by X0 sex chromosomes.

Choose the correct option:

Assertion [A]: Turner syndrome occurs only in females.

Reason [R]: Turner syndrome is characterised by X0 sex chromosomes.

Q. (i)
Assertion: A circle is not a rectilinear figure.
Reason: A figure formed by straight lines only is called a rectilinear figure.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.
(ii)
Assertion: All right angles are equal to one another.
Reason: A unique line passes through a single point.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

Q. Assertion: A circle is a rectilinear figure.
Reason: A figure formed of line segments only is called a rectilinear figure.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
(d) Assertion is false and Reason is true.

Q. Assertion: A cyclic parallelogram is a square.
Reason: Diameter is the largest chord in a circle.
(a) Both Assertion and Reason are true and Reason is a correct explanation of Assertion.
(b) Both Assertion and Reason are true but Reason is not a correct explanation of Assertion.
(c) Assertion is true and Reason is false.
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