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Science · 2023 · 1 mark
CBSE 2023 · Region 4 · Set 1 · Q18
Assertion (A): In humans, if gene (B) is responsible for black eyes and gene (b) is responsible for brown eyes, then the colour of eyes of the…
Assertion (A) : In humans, if gene (B) is responsible for black eyes and gene (b) is responsible for brown eyes, then the colour of eyes of the progeny having gene combination $\displaystyle \mathrm{Bb}, \mathrm{bb}$ or BB will be black only.
Reason (R) : The black colour of the eyes is a dominant trait.
Official answer
(D)
(A) is false but (R) is true.
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CBSE Class 10 Science past-paper question from the 2023 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.