Botany-(general)
NEET Botany (general) MCQ Question
Type: MCQ-fact-Hard-Class 12
What is the primary cause of Down's syndrome as described in the provided context?
A
An additional copy of chromosome 21
B
A single base pair mutation
C
A deletion of chromosome 21
D
A dominant allele on chromosome 21
Correct Answer
Option A
Detailed Explanation
Down's syndrome is specifically caused by the presence of an additional copy of chromosome 21, known as trisomy of 21.
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