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Percent Of The Cases Genetic Disorders
1,268 wordsDown syndrome, the most common genetic birth defect associated with mental retardation, occurs equally across all races and levels of society. The effects of the disorder on physical and mental development are severe and are expressed throughout the life span. The individual's family is also affected emotionally, economically, and socially (Bellenir 1996). Characteristics associated with Down syndrome include: epicanthus folds, unilateral squints, a flat saddle nose, flat jaw bones, large fissur...
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People Who Suffer Downs Syndrome
2,784 wordsAll children that are born with Downs Syndrome (previously called mongolism) have a common characteristic appearance and may also share similar congenital birth defects. Dr John Downs, of whom the condition is so named after, found that children who were born with these similar characteristics and that after testing were complete. It was found that there was a common chromosome abnormality, which is known as Trisomy 21 (Cunningham, 1996). Every pregnant woman is at risk of having a Downs Syndrom...
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The Human Genome Project
727 wordsA genome is all the DNA in an organism, including its genes. Genes carry information for making all the proteins required by all organisms. These proteins determine, among other things, how the organism looks, acts, processes and fights infections. DNA is made up of four similar chemicals (bases, adenine , Thymine
, cytosine , and guanine ) that are repeated millions or billions of times throughout a genome. The human genome has three billion base pairs. The order of these base pairs...
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Downs Syndrome Genetic Disorder
1,468 words... y common in Downs Syndrome babies. Another thing that should be checked is for congenital dislocation of the hips. Extra care should be taken during the usual neonatal examination. In about 13 % of Downs Syndrome newborns there are already version problems with congenital cataracts. The removal of this early is very crucial. The sooner removed the better the babies vision is. (How to treat people with Downs Syndrome) Infancy It is extremely important to watch that the child during infancy do...
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21 St Chromosome Downs Syndrome
388 wordsDowns Syndrome- A Chromosome Abnormality Aimee-Kate 3 - 2 In humans the Chromosome compliment is 46, however in a person with the disease called Downs Syndrome, an extra chromosome is formed to give 47. Usually in Downs Syndrome there is an extra copy of chromosome 21. Also called Trisomy 21, this is the most common variant of Downs. The effects of this extra chromosome are that this person will have a learning disability. The average life expectancy for a sufferer of Downs Syndrome without furt...
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People With Down Syndrome Chromosome 21
666 wordsDown Syndrome Down Syndrome is a chromosomal disorder. It occurs in about 1 of every 800 births. People with Down syndrome may have mild to severe learning disabilities. Physical symptoms include a small skull, extra folds of skin under the eyes, and a protruding tongue. People with Down syndrome are subject to a variety of medical problems including heart abnormalities and thyroid gland dysfunction. Survival rates have been increased dramatically in recent years as problems specific to Down syn...
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Syndrome Down Syndrome Risk Is 1 Age
390 wordsDown Down Syndrome Down Syndrome Down Syndrome is caused by a trisomy of the 21 st chromosome, which means that there are three of chromosome 21 instead of 2. Symptoms of the disorder include: mental retardation, abnormal creases in the palm, a flat face, sparse and strait hair and short stature. People with Down syndrome are also at a high risk for cardiac anomalies, leukemia, cataracts and digestive blockage. Fifty percent of babies with the syndrome die before age one. Down syndrome can be de...
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Extra Chromosome Chromosome 21
527 wordsDown Down Syndrome Down Syndrome Down Syndrome, which used to be called mongolism, is a congenital malformation accompanied by moderate to severe mental retardation, is caused by a chromosomal abnormality. People with Down syndrome are often short in height and have a small, round head with a high, flattened forehead and split, dry lips and tongue. A typical feature is a fold of skin, the epicanthus fold, on either side of the bridge of the nose. The palms show a single transverse crease and the...
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Children With Down Syndrome Extra Chromosome
446 wordsDown Syndrome Report by: SCHOOL SUX The chromosomal abnormality involved in most cases of Down syndrome is trisomy- 21, or the presence of three copies of the 21 st chromosome. As a result, the affected person has 47 chromosomes in all body cells instead of the normal 46, although how this causes the conditions symptoms is not yet known. Scientists assume that the reason for the abnormal chromosomal assortment is the fertilization of an ovum having 24 chromosomes by a sperm with a normal assortm...
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Mental Retardation Extra Chromosome
536 wordsState that meiosis is a reduction division in terms of diploid and haploid numbers of chromosomes Outline the process of meiosis including pairing of chromosomes followed by two divisions which result in four haploid cells In meiosis, the number of chromosomes is halved, the daughter cells receiving only one of each type of chromosome instead of two. It occurs in the formation of gametes (sex cells). In the diploid parent cell, chromosomes occur in homologous pairs (the same size). The parent sp...
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