CBSE 2023 · Region 3 · Set 1 · Q13 · 1 mark
Assertion (A) : In humans the genotype with all the dominant alleles (AABBCC) will have the darkest skin colour.
Reason (R) : In a polygenic trait, phenotype reflects the contribution of each allele.
Official answer
From CBSE’s own marking scheme for this paper.
(A)
Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
Principles of Inheritance and VariationPolygenic InheritanceUnderstandassertion_reasonmedium
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CBSE Class 12 Biology past-paper question from the 2023board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.