He first described the condition as “Mongolism,” but was later changed to Down syndrome. Trisomy 21 is an abnormality in chromosome 21. What causes the condition is the added chromosome to human chromosome 21. This chromosome is very important as it contains about 300 genes that create our body. The extra genetic material completely changes the normal development of a human, causing Down syndrome. This trait is not inherited. It usually occurs at random when the reproductive cell of the parent is forming. About 1 in 800 infants are born with Down syndrome. There is also a higher rate of having a child with Down syndrome if the woman has a child at a later age. But saying that since the abnormality is a random occurrence it may still happen at any age of a woman’s
He first described the condition as “Mongolism,” but was later changed to Down syndrome. Trisomy 21 is an abnormality in chromosome 21. What causes the condition is the added chromosome to human chromosome 21. This chromosome is very important as it contains about 300 genes that create our body. The extra genetic material completely changes the normal development of a human, causing Down syndrome. This trait is not inherited. It usually occurs at random when the reproductive cell of the parent is forming. About 1 in 800 infants are born with Down syndrome. There is also a higher rate of having a child with Down syndrome if the woman has a child at a later age. But saying that since the abnormality is a random occurrence it may still happen at any age of a woman’s