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Science · 2024 · 1 mark
CBSE 2024 · Region 3 · Set 2 · Q19
Assertion (A): In human beings, males have 'XX' sex chromosomes and females have 'XY' sex chromosomes. Reason (R): Sex of the child is determined at…
Assertion (A) : In human beings, males have 'XX' sex chromosomes and females have 'XY' sex chromosomes.
Reason (R) : Sex of the child is determined at the time of fertilisation when male and female gamete fuse to form a zygote.
Official answer
(D)
(A) is false, but (R) is true $\displaystyle 1$ Reason (R) : Oxides of metals react with acid to form salt and water.
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CBSE Class 10 Science past-paper question from the 2024 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.