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Down Syndrom

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Down Syndrom
Sharjah American International School

Biology

Done By:

16-02-2010

Outline:
Abstract
a) Down syndrome b) Interesting topic c) Understanding why down syndrome occurs Introduction a) Who discovered Down syndrome b) What is Down syndrome
Body research A. What Causes it and is it inherited?

1-Trisomy 21
2-Mosaic Down syndrome
3-Translocation Down syndrome

B. How Down syndrome affects Kids
1-Physical features
2-Learning

C. Risk factors
1-Advancing maternal age
2- Being carriers of the genetic translocation for Down syndrome
3-Having had one child with Down syndrome

D. Health Issues
1- Health complications
2-Average life expectancy

E. Can Down syndrome be cured? F. Can Down syndrome be diagnosed before the child is born? 1- Screening tests 2- Diagnostic tests.

Conclusion References

Abstract: * Many people ask what causes Down’s syndrome and what are the Signs and Symptoms of it. * To understand why Down syndrome occurs, the structure and function of the human chromosome must be understood. * This topic sounds interesting because we can learn more and more about Down’s syndrome and this make a big difference in the lives of both children and adults with Down syndrome. * During the research we will know the reasons why some parents have a greater risk of having a baby with Down syndrome.

Introduction:
In 1866, British Doctor John Langdon Down first described Down syndrome as a disorder, but he misunderstood how Down syndrome arises. In 1959 French doctor, named Jerome Lejeune, discovered it was caused by the inheritance of an extra chromosome 21.
Down syndrome (DS), also called Trisomy 21, is a condition in which extra genetic material causes delays in the way a child develops, both mentally and physically. It affects about 1 in every 800 babies.
The physical features and medical problems associated with Down syndrome can vary widely from child



References: http://www.medicinenet.com/down_syndrome/article.htm http://www.medicinenet.com/down_syndrome/page2.htm http://www.mayoclinic.com/health/down-syndrome/DS00182/DSECTION=coping-and-support

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