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Science · 2022 · 3 marks
CBSE 2022 · Region 2 · Set 1 · Q10
(a) Name the two types of gametes produced by men. 1/2+1/2 (b) Does a male child inherit X chromosome from his father? Justify. 1/2+ 1 (c) How many…
(a)
Name the two types of gametes produced by men. $\displaystyle \frac{1}{2}+\frac{1}{2}$
(b)
Does a male child inherit X chromosome from his father ? Justify. $\displaystyle \frac{\mathbf{1}}{\mathbf{2}}+\mathbf{1}$
(c)
How many types of gametes are produced by a human female ? $\displaystyle \frac{1}{2}$
Marking-scheme solution
(a) Sperm having X chromosome and sperm having Y chromosome
(b) No. As male child gets only Y chromosome from his father and X chromosome from mother to have XY chromosome.
(c) One type / only ovum / egg
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CBSE Class 10 Science past-paper question from the 2022 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.