Down Syndrome Explained

The best person to answer a question about Down syndrome is a person with Down syndrome. Krystal answers this one.

 

Down syndrome is a naturally occurring chromosomal arrangement in which a person has an extra copy of chromosome 21.

Down syndrome is a naturally occurring chromosomal arrangement that has always been a part of the human condition. The sole characteristic shared by all people with Down syndrome is the presence of extra genetic material associated with the 21st chromosome. This happens because of an error during cell division when the egg and sperm first meet. The effects of that extra genetic material vary greatly from individual to individual.

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