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In chromosome 22 corresponds to the human chromosome 21 and thus trisomy 22 causes Down syndrome in apes.

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from the original on 2017-01-23.

As the registry grows, families and researchers learn more about Down syndrome and identify similarities and differences in the symptoms and treatment of people with Down syndrome from around the world.

Chorionic villus sampling CVS —examines material from the placenta• Mental and social development delays may mean that the child could have:• They come with an excessive flexibility in their body.

with Down syndrome is just 35 years old.

While and poor are contributing factors, the severity of these periodontal diseases cannot be explained solely by external factors.

However, not all parents of people with translocation trisomy 21 have a translocation.

In this case, an error during the formation of the egg or the sperm results in either one having an extra chromosome.