Q.4. Why is it that women exceeding 40 years of age have more chances of having a child with Down's syndrome?
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Explanation:
The women exceeding 40 years of age have more chances of having a child with Down's syndrome because increased age affects the meiosis of chromosomes adversely. The meiosis remains incomplete until fertilization.
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0
Answer:
bcoz at the age of 40 ovulation is not properly or even absent
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