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Free research papers and essays on topics related to: trisomy

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  • Chapter 10 Definitions - 556 words
    Chapter 10 Definitions autosome: any chromosome other than the sex chromosome base deletion: a mutation in which a nucleotide is lost from the DNA sequence base insertion: a mutation in which a nucleotide base is added to the DNA sequence carrier: an individual who is heterozygous for a recessive trait chromosome mapping: a method of determining the relative position of genes on a chromosome using information on crossover frequency crossing over: exchange of parts between two homologous chromosomes deletion: a mutation in which a chromosomal piece breaks off and is lost frame-shift mutation: a mutation in which a base deletion or insertion cause the genes message to be translated incorrectly ...
    Related: turner syndrome, sickle cell, cell disease, error, syndrome
  • Downs Syndrome, It Is One Of The Most Frequently Occurring Chromosomal Abnormalities Found In Humans Effecting People Of All - 1,868 words
    Down's Syndrome, it is one of the most frequently occurring chromosomal abnormalities found in humans effecting people of all ages, races and economic levels. It is a chromosomal anomaly in cell development that results in a person being born with forty-seven chromosomes instead of the normal forty-six chromosomes. People with Down syndrome may have mild to severe learning disabilities and physical symptoms, which include a small skull, extra folds of skin under the eyes, and a protruding tongue. Roughly one out of every one thousand children born making it the most common genetic disorder. Down syndrome affects over 350,000 people, in the United States alone. Down syndrome has plagued the h ...
    Related: chromosomal, down syndrome, downs, human body, human race, occurring
  • Each Year, Three Thousand To Five Thousand People Are Diagnosed With Down - 906 words
    "Each year, three thousand to five thousand people are diagnosed with Down Syndrome in the United States. It is found in approximately one out of one thousand all live births." (Nadel,37). Down Syndrome occurs when there is an abnormality in chromosome 21. Most people with Down Syndrome (approximately ninety-five percent) has an extra 21 chromosome. Instead of the normal number of forty-six chromosomes in each cell, the individual with Down Syndrome has forty-seven chromosomes. "This condition is called trisomy 21."(Pueschel,6) .Down Syndrome is a combination of birth defects including some degree of physical abnormalities, musculoskeletal disorders, and hypothyroidism. Granted, individuals ...
    Related: diagnosed, down syndrome, blood cells, problems associated, tissue
  • Sensitive Chromosome Probes Recently Discovered By A University Of Toronto Geneticist Will Make It Easier To Detect Certain T - 714 words
    Sensitive chromosome probes recently discovered by a University of Toronto geneticist will make it easier to detect certain types of genetic and prenatal diseases, as well as being used to determine paternity and provide forensic evidence in criminal cases. Probes are short pieces of DNA which bind to, and actually pinpoint, particular sites on a chromosome. Because these new probes are actually repeated hundreds or thousands of time at a particular site, they are much more sensitive than previously available ones. Of the 23 pairs of human chromosomes, Dr. F.H. Willard has discovered repeated probes or markers for six plus the gender determining X and Y chromosomes. "What we're trying to dec ...
    Related: chromosome, detect, sensitive, toronto, pregnant women
  • Various Genetic Disorders - 1,099 words
    Various Genetic Disorders Various Genetic Disorders Alterations in human chromosomes or the deletion of an important gene product are often due to a mutation, which can spring an abundant strand of genetic mutations and improper coding. Mutations can spring from deletion, duplication or inversion of a chromosome. This improper deletion is the factor that leads to complications and ultimately genetic disorders. Turner Syndrome and Cat-cry Syndrome are both alterations of chromosome structure due to deletion. In Turner Syndrome, there is a missing X chromosome and in the Cat-cry Syndrome chromosome-18 has been lost or deleted. Other genetic disorders that give rise to discussion are point muta ...
    Related: communication disorders, disorders, genetic, genetic disorder, bone marrow
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