Biology 101 / Genetics

DOWN SYNDROME2007Normally , each human cosmos possesses twenty-three suspenders (for a forty-six ) of chromosomes - strands of DNA and associated proteins which house genes that in turn , enroll for the production of specific proteins During nurture , these chromosome pairs undergo meiosis wherein they whizz out (and migrate to different portions of the cell , so that egg and sperm cells each have only twenty-three chromosomes or beneficial fractional of the twenty-three pairs . The original number of chromosomes is merely restored in the offspring since both parents pass on their half of the chromosome pairs to their nipperren (Krogh , 2003Errors however , may occur during this division of cells in cooking for reproduction . Instead of segregating universally , sometimes a chromosome pair may fail to divide and thus have the mishap of universe passed on as well to the offspring . When this happens , the child so ends up with three copies of that accompaniment chromosome instead of the normal twain . This is what happens with hatful Syndrome wherein the child inherits three copies of chromosome 21 specifically This particular condition is termed as trisomy 21 (Leshin , 2000Since each chromosome contains genes that fork over the control for the production of proteins , it can therefrom be judge that having an tautologic copy of chromosome 21 would lead to an overexpression or overrun of the proteins being coded for by the genes found particularly in chromosome 21 .
Although the torso has a way of regulating the activity of genes and their protein products , it is liable(predicate) that such regulatory mechanisms may not be abundant to exterminate the negative effects of the overexpression of the extra genes . In add-on , the proteins produced to the highest degree likely interact as well with other proteins , therefore upsetting the normal balance of proteins present in the organic structure consequently giving rise to the symptoms and conditions associated with Down Syndrome (Leshin , 2000ReferencesKrogh , D (2003 . biology : A Guide to the Natural population , 3rd ed Companion WebsiteRetrieved regrets . 31 , 2007 , from HYPERLINK hypertext take out protocol /wps .prenhall .com /esm_krogh_biology_3 http /wps .prenhall .com /esm_krogh_biology_3Leshin , L (2000 . Trisomy 21 : The Story of Down Syndrome . Retrieved Dec . 31 , 2007 , from http /www .ds-health .com /trisomy .htmDOWN SYNDROME Page 1DOWN SYNDROME Page 2...If you want to target a full essay, order it on our website: BestEssayCheap.com

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