What Is Trisomy 21?

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Genetic Disease Project: Trisomy 21
What is Trisomy 21? For starters, Trisomy 21 is another for a genetic disease called Down Syndrome. Genetic Home Reference says “Trisomy 21 is a chromosomal condition that is associated with intellectual disability, a characteristic facial appearance, and weak muscle tone (hypotonia) in infancy. All individuals affected experience cognitive delays, but the intellectual disability is usually mild to moderate. You get Down Syndrome by having a extra set of chromosomes. The female has 2 sets of chromosomes and the male has 1 set of chromosomes. Before the offspring is created the female parent has to get rid of 1 set of chromosomes, but since she didn’t get rid of the extra set of chromosomes the offspring is

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