la sindrome di down, Appunti di Inglese

Scarica la sindrome di down e più Appunti in PDF di Inglese solo su Docsity! DOWN SYNDROME DOWN SYNDROME ALSO CALLED TRISOMY 21 IS A GENETIC CONDITION CAUSED BY THE PRESENCE OF AN EXTRA CHROMOSOME JOHN LANGDON DOWN WHO FIRST BRITISH DOCTOR THAT DESCROBED THIS CONDITION IN 1887 NORMALLY THE CAUSE OF DOWN SYNDROME IS AN EXTRA CHROMOSOME FOR A TOTAL OF 47 CHROMOSOME INSTEAD 46. ANOTHER CAUSES MAY BE HORMONAL ABNORMALITIES, X-RAYS, VIRAL INFECTIONS, GENETIC PREDISPOSITION OR ADVANCED MATERNAL AGE ALMOST CHILDREN BORN WITH DOWN SYNDROME HAVE CONGENITAL PROBKEMS SUCH AS: HEART DEFECT, HEARING,VISION, OBESITY AND OTHER HEALTH PROBLEMS AMNIOCENTESIS IS A TEST CEN BE PERFORMED BEETWEEN 15 OR 20 WEEKS AND THE CELLS CAN THEN BE ANALYZED FOR THE PRESENCE OF CHROMOSOMAL ABNORMALITIES