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Free research essays on topics related to: extra chromosome

17 results found, view free essays on page:

  • 21 St Chromosome Extra Chromosome
    583 words
    Down Syndrome or Trisomy 21 as it is also commonly known, is a genetic condition that for many years has been shrouded in fear, darkness & shame. There is absolutely nothing to fear, and there never should be any feelings of shame, it is not the persons fault. The only darkness associated with down syndrome is the ignorance many people have towards it. Basically down syndrome means that a person has one extra chromosome in each of the million of cells in their body. Instead of 46 chromosomes per...
    Free research essays on topics related to: trisomy 21, genetic material, cell division, extra chromosome, 21 st chromosome
  • Genetic Disorder Severe Mental
    1,175 words
    To the Parents or Legal Guardians of Patient XC 902 -V 42 In our extensive testing it was revealed to us that your son suffers from a genetic disorder called Trisomy 13 or Patau's Syndrome. Trisomy 13 is a syndrome caused by an extra 13 th chromosome. As you may be aware that humans have 23 chromosomes in pairs of two. In your son's case the 13 chromosome has and extra pair. Normally it is thought that a Trisomy occurs when, at conception, either the father's sperm or the mother's egg contained ...
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  • Percent Of The Cases Genetic Disorders
    1,268 words
    Down 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...
    Free research essays on topics related to: mental retardation, genetic disorders, extra chromosome, genetic material, percent of the cases
  • People Who Suffer Downs Syndrome
    2,784 words
    All 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...
    Free research essays on topics related to: people who suffer, child born, extra chromosome, downs syndrome, genetic material
  • Children With Down Syndrome One Of The Most Common
    598 words
    Sometimes when meiosis (the division of reproductive cells) occurs, chromosomes may be lost, left behind, or too many may be passed on, resulting in the birth of a child with a genetic or congenital defect or disease. One of the most common of these genetic disorders is Down syndrome. This disorder takes its name from Dr. Langdon Down, who was the first to describe it formally, in 1866. Down syndrome is a condition marked by abnormal physical and mental development that is caused by a genetic de...
    Free research essays on topics related to: children with down syndrome, life expectancy, one of the most common, extra chromosome, genetic defect
  • People With Down Syndrome 21 St Chromosome
    1,571 words
    H 2 > Introduction In the United States about one in every 1000 live births is a child with Downs Syndrome. Downs Syndrome affects all races and genders. It is caused by extra genetic material on the twenty-first chromosome. There are three different types of Downs Syndrome known to man today. The first case of reported was in the late 1950 s, but the condition was identified in the late 1960 s. In most cases it is simple to identify an individual with Downs Syndrome. In most cases the f...
    Free research essays on topics related to: 21 st chromosome, people with down syndrome, downs syndrome, muscle tone, extra chromosome
  • 21 St Chromosome Downs Syndrome
    388 words
    Downs 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...
    Free research essays on topics related to: downs syndrome, 21 st chromosome, give birth, extra chromosome, chromosome 21
  • Child With Down Syndrome People With Down Syndrome
    1,218 words
    Down syndrome is a genetic disease caused by three major factors, genetics, chromosome formation and cell division. Through scientific research, scientists have made vast discoveries on how to "treat" people with the disease and how to help families cope with a child with Down syndrome. Through our research we hope to make more people aware of Down syndrome, how it is caused, how they can help and what is being done to treat people with the disease, so that one day it may be "curable. " Down's s...
    Free research essays on topics related to: cell division, 21 st chromosome, extra chromosome, people with down syndrome, child with down syndrome
  • Neural Tube Defects Central Nervous System
    1,262 words
    ... b. /March 1991). Spontaneous errors in development, whose causes are unknown, can happen in the central nervous system, face, gut, genitourinary system, and heart as shown in Table 2. The time during pregnancy which these may occur is also is also shown in Table 2 and ranges from twenty-three days to twelve weeks, all which fall into the first trimester. How these anomalies are triggered in birth defects is unknown. Neural Tube Defects, which causes are also unknown, are some of the most com...
    Free research essays on topics related to: birth defects, central nervous system, prentice hall, mental retardation, neural tube defects
  • Extra Chromosome Genetic Material
    1,960 words
    In 1942, Dr. Harry Klinefelter and his coworkers at the Massachusetts General Hospital in Boston published a report about nine men who had enlarged breasts, sparse facial and body hair, small testes, and an inability to produce sperm. By the late 1950 s, researchers discovered that men with Klinefelter syndrome, as this group of symptoms came to be called, had an extra sex chromosome, XXY instead of the usual male arrangement, XY. In the early 1970 s, researchers around the world sought to ident...
    Free research essays on topics related to: extra chromosome, social skills, x chromosomes, y chromosome, genetic material
  • Children With Down Syndrome Child With Down Syndrome
    1,179 words
    Down Down Syndrome 4 Introduction Down syndrome is a chromosomal abnormality. It is the most frequent form of mental retardation and is characterised by well-defined, distinctive phenotypic features and natural history. An error in cell development results in forty-seven chromosomes rather than the usual forty-six. There are three major types of Down syndrome. About ninety-five percent of individuals with Down syndrome have Trisomy 21. There is also Translocation and Mosaicism. Down syndrome can...
    Free research essays on topics related to: child with down syndrome, mental retardation, 21 st chromosome, children with down syndrome, mentally retarded
  • Extra Chromosome Trisomy 21
    494 words
    Down Syndrome: An Informative Essay Down Syndrome is the name for babies born with a disorder related to their chromosomes. It is caused when meiosis occurs and an error occurs in the cells development. The reason for this defect is often because the parent is over 40 or for some other reason their meiosis is not Up to par. The actual defect is an extra chromosome is developed during cell development. The abnormal development results in 47 chromosomes rather than the usual 46 (23 from each paren...
    Free research essays on topics related to: babies, extra, trisomy 21, syndrome, extra chromosome
  • Extra Chromosome Chromosome 21
    527 words
    Down 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...
    Free research essays on topics related to: chromosomal, extra chromosome, chromosome 21, 21 st, syndrome
  • Neural Tube Defects Children With Down Syndrome
    2,759 words
    Downs syndrome is a genetic condition involving an extra chromosome, this change occurs around the time of conception. A person with Downs syndrome has forty-seven chromosomes instead of the usual forty-six. A relatively common genetic disorder, Downs strikes 1 out of 600 babies. In 95 percent of all cases, the disorder originates with the egg, not the sperm, and the only known risk factor is advanced maternal age-at age 35, a woman has 1 chance in 117 of having a baby with Downs; at 40, her odd...
    Free research essays on topics related to: child with down syndrome, neural tube defects, vitro fertilization, people with down syndrome, children with down syndrome
  • Children With Down Syndrome Extra Chromosome
    446 words
    Down 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...
    Free research essays on topics related to: physical features, rights reserved, chromosome 21, extra chromosome, children with down syndrome
  • Mental Retardation Extra Chromosome
    536 words
    State 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...
    Free research essays on topics related to: extra chromosome, mental retardation, chromosome 21, daughter cells, law
  • Mental Retardation Extra Chromosome
    1,780 words
    THEKlinefelter Syndrome KLINEFELTER SYNDROME THE XXY BOY IN THE CLASSROOM Although there are exceptions, XXY boys are usually well behaved in the classroom. Most are shy, quiet, and eager to please the teacher. But when faced with material they find difficult, they tend to withdraw into quiet daydreaming. Teachers sometimes fail to realize they have a language problem, and dismiss them as lazy, saying they could do the work if they would only try. Many become so quiet that teachers forget theyre...
    Free research essays on topics related to: y chromosome, genetic material, extra chromosome, x chromosome, mental retardation

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