CBSE 2025 · Region 4 · Set 3 · Q4 · 1 mark
A pedigree chart in shown below for a disease that is autosomal dominant. The genetic make-up of the first generation is :
Official answer
From CBSE’s own marking scheme for this paper.
(B)
Aa, aa
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CBSE Class 12 Biology past-paper question from the 2025board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.