By: Nadia Alcantar
Probably you have seen people with down syndrome. They may have medical problems, too, such as heart defects. Kids with Down syndrome usually have trouble learning and are slower to learn how to talk and take care of themselves. About 1 out of every 800 babies born in the United States has Down syndrome. doctors aren't sure why this chromosome problem happens to some babies. "It's nothing the mom or dad did before the child was born. Anyone can have a baby with Down syndrome. But the older the mother, the greater the risk."In 1866 down syndrome was discoverd by Dr John Langdon Down. In every cell in the human body there is a nucleus, where genetic material is stored in genes. Genes carry the codes responsible for all of our inherited traits and are grouped along rod-like structures called chromosomes. Typically, the nucleus of each cell contains 23 pairs of chromosomes, half of which are inherited from each parent. Down syndrome occurs when an individual has a full or partial extra copy of chromosome 21.