Learning Disabilities{Down Syndrome}
Down syndrome is a birth defect caused by a genetic disorder that affects 350,000 people in the United States. It is caused by abnormalities in the genes and is not inherited, meaning that parents do not pass this onto their children. Genetics is the study of heredity or how certain traits are passed from parents to their children. Genes are the basic unit of heredity. Cells are the building blocks of your body and each one of us has more than 100 trillion cells. Our genes are located in chromosomes. Each cell in your body contains 46 chromosomes or 23 pairs. In a person with Down syndrome, there are 47 chromosomes. In 1956, a French researcher named Jerome Lejeune used a new powerful microscope to view human strands of DNA. DNA is what holds an individual person’s genes. He studied these DNA strands and determined that there is an extra strand in chromosome 21, which is now called “Trisomy 21” tri meaning three and somy for the word chromosome – meaning three chromosomes. No one knows exactly what causes Down syndrome aside from it being genetic. Many years ago, this condition was known as “mongolism” or people that had it were called “Mongolian idiots”. But in later years, Asian people as well as parents of these ch
. . .
Some common words found in the essay are:
John Langdon, , DNA DNA, Sampling CVS, Administration FDA, Sampling PUBS, Intervention TNI, Disabilities Act, Genome Project, Fullerton California, people syndrome, syndrome suffer, muscle tone, people syndrome suffer, poor muscle tone, abnormalities test, mental retardation, motor skills, afflicted syndrome, parents children, poor muscle, person syndrome,
Approximate Word count = 1101
Approximate Pages = 4 (250 words per page double spaced)
|
 |
