Describe Down syndrome. What it is, its causes, and its symptoms? What are the odds of having a child with Down syndrome?
What will be an ideal response?
A good answer will be similar to the following:
+ Down syndrome is a genetic disorder that is caused by an extra 21st chromosome that is usually provided by the egg.
+ Symptoms:
- almond-shaped eyes
- a fold over the eyelid
- smaller than normal head, neck, and nose
- delayed mental and behavioral development
- intellectual disability
+ Odds that a woman will bear a child with Down syndrome increases markedly as she gets older. The increased risk may be because a woman's eggs have been in her ovaries since her own prenatal development.
- For a woman in her late 20s — the risk is about 1 in 1,000.
- For a woman in her early 40s — the risk is about 1 in 50.
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