Biotechnology And Its Applications Question 37
Question: Frequency of Down’s syndrome increases when the maternal age is [Orissa JEE 2004]
Options:
A) Above 35 years
B) Below 35 years
C) During 1st pregnancy
D) In mothers of at least 3 children
Show Answer
Answer:
Correct Answer: A
Solution:
They occur in 1/700 births in women aged 25 years or under.
The frequency increases with age to about 1/100 for women of age 40 and 1/10 for women of age 45.
BETA
