Question

Assertion (A): Sex of the children will be determined by what they inherit from their mother. Reason (R): Women have XX sex chromosomes.

• A. Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
• B. Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
• C. Assertion (A) is true, but Reason (R) is false.
• D. Assertion (A) is false, but Reason (R) is true.

Answer 1

The Correct Option is D

Step 1: Analyze the Assertion (A)
Assertion (A): Sex of the children will be determined by what they inherit from their mother.
❌ This statement is false. The sex of the child is determined by the sex chromosome inherited from the father, not the mother.
- Mothers always contribute an X chromosome.
- Fathers can contribute either an X or a Y chromosome.
- If the child inherits an X from the father → girl (XX).
- If the child inherits a Y from the father → boy (XY).

Step 2: Analyze the Reason (R)
Reason (R): Women have XX sex chromosomes.
✔️ This statement is true. Female individuals possess two X chromosomes (XX), while males have one X and one Y chromosome (XY).

Step 3: Check the logical connection
Since the assertion is false and the reason is true, and the reason does not support the incorrect assertion,

Final Answer:
Assertion (A) is false, but Reason (R) is true.