Down Syndrome. By: Colleen Hybl. Chromosomal Abnormalities. 3 Types of Down Syndrome, but all of them occur on the 21 st chromosome as an extra chromosome. 1. Trisomy 21: An entire extra chromosome 21 in all cells, so each one has 47 chromosomes in each body cell.
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By: Colleen Hybl
1. Trisomy 21: An entire extra chromosome 21 in all cells, so each one has 47 chromosomes in each body cell.
2. Translocation: The extra 21st chromosome material takes the place of part of another chromosome.
3. Moscaicism: An extra whole chromosome is present, but only in some of their cells.
Muscle & bone
Ear, nose, & throat
Susceptible to respiratory infection
Mental Retardation (when the extra chromosome is placed in disturbs the brain cells)
Prone to develop Leukemia & Alzhemier’s disease
Most are sexually underdeveloped & sterile
Bowman-Kruhm, Mary, Ed.D. Everything You Need to Know About: Down Syndrome. New York: The Rosen Publishing Group, Inc., 2000
Campbell, Neil A. AP* Edition: Biology Eighth Edition. San Francisco: Pearson Benjamin Cummings.2008
Down Syndrome is a genetic disorder that is cause by an extra chromosome on the 21st chromosome.
Even if child is born with Down Syndrome they can still leave lives that are similar or the same as children without Down Syndrome, like graduate and have a career.