CBSE Class 10 Science 2020 · Paper 31/4/1 · Question 14

Heredity 1 mark Medium

For question numbers 13 and 14, two statements are given — one labelled as Assertion (A) and the other labelled as Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below :

Assertion (A): The sex of a child in human beings will be determined by the type of chromosome he/she inherits from the father.

Reason (R): A child who inherits ‘X’ chromosome from his father would be a girl (XX), while a child who inherits a ‘Y’ chromosome from the father would be a boy (XY).

(a)Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).
(b)Both (A) and (R) are true, but (R) is not the correct explanation of the assertion (A).
(c)(A) is true, but (R) is false.
(d)(A) is false, but (R) is true.

Answer

(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion (A).

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CBSE Class 10 Science 2020 · Paper 31/4/1 · Question 14

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