Question
Biology Question on General Science
Down's Syndrome is characterized by the presence of an extra ________ chromosome.
A
X
B
21
C
Y
D
23
Answer
21
Explanation
Solution
The correct answer is (B) : 21.
Down's Syndrome is characterized by the presence of an extra ________ chromosome.
X
21
Y
23
21
The correct answer is (B) : 21.