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Biology · 2025 · 2 marks
CBSE 2025 · Region 1 · Set 2 · Q18
Study the pedigree analysis of Myotonic dystrophy given below: Answer the following questions: (a) Write genotype of A, B, C and D (b) Identify…
Study the pedigree analysis of Myotonic dystrophy given below :
Answer the following questions :
(a)
Write genotype of A, B, C and D
(b)
Identify whether the trait is
(i)
Sex linked or autosomal
(ii)
Dominant or recessive
Marking-scheme solution
(a)
Genotype A = Aa, B = aa, C = Aa, D = aa
(b)(i)
Autosomal trait
(ii)
Dominant
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CBSE Class 12 Biology past-paper question from the 2025 board exam, with the answer as CBSE’s own marking scheme gives it. Where our answers come from.