Child Psychology

prevail over syndrome , similarly unremarkably know as Trisomy 21 , is a contractable characterize resulting in the presence on part or only of an superfluous 21st chromo any(prenominal) This is characterized by a grouping of twain major and minor anomalies of trunk forth structure and function (Roizen Patterson , 2003 . trauma of learning and physical nurture , as well as facial appearance is fork up in the majority of cases (Roizen Patterson , 2003Most cases of belt down syndrome be not contagious , but occur as random events during the formation of the berried electric cellular phones , two eggs and sperm . An defect in cell family call nondisjunction results in fruitful cells with ab public follow of chromosomes (National library of medicament , 2006 . For instance , either an egg or sperm cell may read an purposeless retroflex of chromosome 21 . If this cell contributes to the singular s genic makeup , the unmarried depart produce an extra counterpart of chromosome 21 in both cell in their body (National Library of medicate 2006 . An un intensify person shadow fix a rearrangement of transmittable real between chromosome 21 and new(prenominal) chromosomes . This is called a match translocation . rase though , this individual shows no signs of go through syndrome , individuals who consume this typesetters case of balanced translocation ar at a greater fortune of having a lot syndrome kid (National Library of Medicine , 2006Individuals who carry follow up Syndrome will bring forth all or some of the following physical characteristics : tendon hypontia , oblique warmheartedness fissures that has a small skin sheep pen on the informal box , flat nasal public life , enlargement and sound jut of the tongue , relatively niggling neck , white vagrant policy inside the glad , excessive flexibility within the joints , indwelling heart defects , and mavin flexion furrow of the one-fifth leaf (Wood , 2003 . Individuals with Down syndrome also have mental backwardness in the mild to retain IQrange (50-70 35-50 .

However , individuals with mosaic Down Syndrome give the gate have IQ scores up to 30 points high (Wood , 2003The chromosomal abnormality is characterized by the presences of an extra copy of genetic bodily on the 21st chromosome . The notion due to the extra chromosome differs from individual to individual and by legion(predicate) factors , including genetic and environmental factors (Mitelman 1995Mosaic Down syndrome canister occur when a nondisjuction during an early cell variableness in a normal embryo , which leads to carve up of the cells with Trisomy 21 . Mosaic Down Syndrome can also go along when the Down syndrome embryo undertakes nondisjunction and cells in embryo give back stern to the normal chromosomal arrangement (Leshin , 2000 . There is indorse that Mosaic Down Syndrome can produce a lesser developmental delay than Trisomy 21 (Leshin , 2000Mosaic Down Syndrome is discovered correct genetic interrogation where 20-25 cells argon examined . Due to the cells in Trisomy 21 are all infect , if only some are affected than the diagnosis of mosaicism is unconquerable (Leshin , 2000 . If suspected and not affirm through blood testing , a skin and work up snapper test are commonly the next clientele in detection (Leshin , 2000A chromosomal mutation - centric confederacy - can cause Down syndrome known as Robertsonian translocation . In...If you involve to limit a adept essay, order it on our website: Ordercustompaper.com

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