AIPMT PRELIMS2003Botany-Genetics
AIPMT PRELIMS 2003 Botany Chromosomal disorders MCQ Question
Type: MCQ-numerical-Hard-Class 12
Down's syndrome is caused by an extra copy of chromosome number 21. What percentage of offspring produced by an affected mother and a normal father would be affected by this disorder :-
A
100%
B
75%
C
50%
D
25%
Correct Answer
Option C
Detailed Explanation
If the mother is affected and the father is normal, there is a 50% chance the offspring will inherit the extra chromosome.
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