Down Syndrome Report Essay Research Paper Down free essay sample

Down Syndrome Report Essay, Research Paper Down Syndrome Report by: SCHOOL SUX The chromosomal abnormalcy involved in most instances of Down syndrome is trisomy-21, or the presence of three transcripts of the 21st chromosome. As a consequence, the affected individual has 47 chromosomes in all organic structure cells alternatively of the normal 46, although how this causes the status # 8217 ; s symptoms is non yet known. Scientists assume that the ground for the unnatural chromosomal mixture is the fertilisation of an egg cell holding 24 chromosomes by a sperm with a normal mixture of 23, but they have besides found that the sperm can transport the excess chromosome every bit good. The unnatural egg cell or sperm is derived from a source cell in which the brace of 21st chromosomes holds together and passes into the same sperm or ovum alternatively of dividing. In the type of Down syndrome called translocation, the excess chromosome 21 stuff is attached to one of the other chromosomes ; when some, but non all, of the organic structure # 8217 ; s cells carry an excess chromosome 21, the status is a type of Down syndrome called mosaicism. We will write a custom essay sample on Down Syndrome Report Essay Research Paper Down or any similar topic specifically for you Do Not WasteYour Time HIRE WRITER Only 13.90 / page Because of the excess chromosome 21, kids with Down syndrome frequently hold some characteristic physical characteristics, such as a little caput, a level face, somewhat upward aslant palpebras, skin creases at the interior corners of the eyes, little olfactory organ and oral cavity, and little custodies and pess. Most of these characteristic do non interfere with the kid # 8217 ; s operation, a physician chiefly uses the features for diagnostic intents. These physical characteristics are variable, and kids with Down syndrome are normally more like other kids than they are different. Persons with Down syndrome besides frequently have certain medical conditions such as weak musculuss, neurological damages, bosom disease, enteric abnormalcies, ill working thyroid secretory organ, oculus abnormalcies, hearing jobs, and skeletal jobs. Almost all kids with Down syndrome are mentally retarded, in the mild to chair scope. The grade of mental deceleration varies well. Through medical intervention the upsets and infections attach toing Down syndrome have no consequence on an about normal life span. The overall incidence of Down syndrome is about one in 700 births, but the hazard varies with the age of the female parent. The incidence of Down syndrome in kids born to 25-year-old female parents is about 1 in 1200 ; the hazard additions to about 1 in 350 for 35-year-olds and about 1 in 120 for adult females older than 40 old ages. Prenatal trials can be used to observe chromosome abnormalcy doing Down syndrome. Beginnings 1 ) # 8220 ; Down Syndrome, # 8221 ; Microsoft ( R ) Encarta ( R ) 96 Encyclopedia. ( hundred ) 1993-1995 Microsoft Corporation. All rights reserved. ( degree Celsius ) Funk A ; Wagnalls Corporation. All rights reserved. 2 ) # 8220 ; Down Syndrome, # 8221 ; Encyclopedia of Sleep and Dreaming.