I have done my report on trisomy 21. This disease was later named Down Syndrome. In 1866 a doctor named John Langdon Down first saw some children that were similar to some other mentally retarded children. He had no idea what this disease was, but was the first person to study it.
As time went on medicine became more advanced. In 1959 a French doctor named Jerome Legeune saw people who had this unknown disease, and that they had 47 chromosomes instead of 46 chromosomes. This disease was then given a name, trisomy 21.
Trisomy means triplication, so the chromosomes triple on the 21st chromosome. Doctors also called this disease Down Syndrome because the first person who studied it ...view middle of the document...
The rest of the differences are less important.
People with trisomy 21 also have increased heath risks or problems. Adults with trisomy 21 have a 25% chance for Alzheimer’s disease instead of 6%. Also they have a 15 to 20 times higher risk to get leukemia.
Without medical advancement, people with Down Syndrome would be very unfortunate. In 1910 children were predicted to die at age 9. When antibiotics were invented the age of survival increased to 20 years old. With very new advancement, people with Down Syndrome can now live to 55 years old and longer.
In the United States around 250,000 families have Down Syndrome. Also around 5,000 children with Down Syndrome are born each year. “Some predictors say that the amount of people with Down Syndrome will double in the next 10 years.” (National Down Syndrome Society, Down Syndrome, April 1997)
When babies have trimony 21 only 20 to 25 percent will live past birth. That fact is terrible. Even though our society is mainly...