Botany-Multiple Alleles
NEET Botany Multiple Alleles MCQ Question
Type: MCQ-fact-Hard-Class 12
What is the genetic cause of Down's syndrome?
A
Presence of an additional copy of chromosome 21
B
Absence of chromosome 21
C
Presence of an additional copy of chromosome 18
D
Presence of an additional copy of chromosome 13
Correct Answer
Option A
Detailed Explanation
Down's syndrome is caused by the presence of an additional copy of chromosome 21, known as trisomy 21, leading to various physical and cognitive characteristics.
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