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Current Research On Muscular Dystrophy
576 wordsDuchenne's muscular dystrophy is the result of a defective gene on the X chromosome. This gene is responsible for production of the muscle protein dystrophic. Dystrophin is an integral part of the dystrophic-glycoprotein complex which bears the brunt of the force generated during muscular contraction. When dystrophic is not produced, the dystrophic-glycoprotein complex (DCG) is not present. Absence of the DCG leads to tears in the muscle membrane because the muscle membrane bears the force of mu...
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Bacteria Cells Harsh Conditions
1,391 wordsAs hard as it is to believe, bacteria (also known to scientists as Bacillus, thuringiensis) are everywhere; on your hands, on door handles, theres even thousands bacteria on the period at the end of this sentence (Thats how small they are). Bacteria have been around for about 3. 5 billion years. They were the first life forms on earth and more numerous then any other species we know of. Yet, while they are extremely common, they are also very small. Bacteria can only be seen with microscopes and...
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Deep Sea High Temperature
600 wordsts, and biochemical pathways. In comparing the organism 60 % of M. jannaschii's coding regions did not correlate with the known sequence database. 40 % of the coding regions match the sequences of bacteria and eukaryotes. Those sequences that are similar to bacteria are genes related to energy production, cell division, and metabolism, whereas the transcription, translation, and replication gene sequences seem to be more similar to eukaryotes. EM/ Methanococcus jannaschii /EM consists of three p...
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Children With Down Syndrome One Of The Most Common
598 wordsSometimes 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...
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Fertilized Egg Y Chromosome
358 wordsSex Chromosomes Chromosomes are the aggregates of genes, carrying heredity information. They comprise of proteins and DNA, and are located within the cells' nucleus. Human cells contain 22 pairs autosomes and only one pair of sex chromosomes. These sex chromosomes, the X and the Y chromosomes determine the sex of the individual, or the gender. In such a way, there are two sex chromosomes in a human somatic cell: XX in female and XY in male. A human germ cell contains only one sex chromosome, whi...
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American Psychological Association Sexual Orientation
1,438 wordsTREATING HOMOSEXUALITY The American Psychological Association (APA) defined homosexuality as one of the three distinct sexual orientations, the other two being, heterosexuality and bisexuality. Sexual orientation is one of the four components of sexuality and is distinguished by an enduring emotional, romantic, sexual or affectionate attraction to individuals of a particular gender (APA). Homosexual refers to the attraction to members of the same gender and people with this kind of sexual orient...
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Parkinsons Disease Nerve Cells
2,155 wordsHistory of Parkinson's Disease Parkinsons Disease (PD) was first described and named after by an English physician named James Parkinson in 1817. This disease is a disorder of the central nervous system and effects one to one-and-a half million Americans. For reasons not understood completely, nerve cells that produce dopamine (the substantia nigra) decrease in number with Parkinsons disease. As a result, there is a decrease in the quantities of available dopamine. In PD, there is a lack of dopa...
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Factor Viii Factor Ix
1,170 wordsRobert Morris Haemophilia Haemophilia Robert Morris In the human body, each cell contains 23 pairs of chromosomes, one of each pair inherited through the egg from the mother, and the other inherited through the sperm of the father. Of these chromosomes, those that determine sex are X and Y. Females have XX and males have XY. In addition to the information on sex, the X chromosomes carry determinants for a number of other features of the body including the levels of factor VIII and factor IX. 1 I...
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University Of Michigan Muscular Dystrophy
598 wordsCurrent Research On Duchennes Muscular Dystrophy Essay, Current Research On Duchennes Muscular Dystrophy Duchennes muscular dystrophy is the result of a defective gene on the X chromosome. This gene is responsible for production of the muscle protein dystrophic. Dystrophin is an integral part of the dystrophic-glycoprotein complex which bears the brunt of the force generated during muscular contraction. When dystrophic is not produced, the dystrophic-glycoprotein complex (DCG) is not present. Ab...
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Identical Twins Sexual Attraction
770 wordsDoes A Gay Gene exist? Two possible ways the genetic material for homosexuality may be transmitted J. Michael Bailey of Northwestern U. and Richard C. Pillard of Boston U. did a study on 161 gay men. Each had at least one identical twin or fraternal twin or adopted brother. Fifty two percent of the identical twins were also homosexual, as compared with twenty two percent of the fraternal twins and eleven percent of the adopted brothers. Similar studies have been done by Dean Hammer and others wi...
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People With Down Syndrome Children With Down Syndrome
490 wordsDown syndrome is one of the most frequently occurring birth defects in the world. It is a chromosomal abnormality which results in 47 chromosomes, instead of 46, with an extra chromosome being 21. Because the majority of Down syndrome cases affect the twenty-first chromosome, it is commonly called trisomy 21. Down syndrome is usually caused by a cell division error, which is known as non-disjunction. This occurs when an embryo develops with three number 21 chromosomes instead of two. This excess...
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Extra Chromosome Trisomy 21
494 wordsDown 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...
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Children With Down Syndrome Child With Down Syndrome
913 wordsPeople Down Syndrome Down Syndrome People with Down syndrome are first and foremost human beings who have recognizable physical characteristics due to the presence of an extra chromosome 21. The estimated incidence of Down syndrome is between 1 in 1, 000 to 1 in 1, 100 live births. Each year approximately 3, 000 to 5, 000 children are born with this chromosome disorder. It is believed there are about 250, 000 families in the United States who are affected by Down syndrome. Children with Down syn...
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Factor Viii Factor Ix
1,119 wordsIn the human body, each cell contains 23 pairs of chromosomes, one of each pair inherited through the egg from the mother, and the other inherited through the sperm of the father. Of these chromosomes, those that determine sex are X and Y. Females have XX and males have XY. In addition to the information on sex, the X chromosomes carry determinants for a number of other features of the body including the levels of factor VIII and factor IX. 1 If the genetic information determining the factor VII...
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Cystic Fibrosis Recombinant Dna
1,125 wordsCancer is diagnosed in almost 1. 5 million people in the United States annually. Approximately one-half million Americans die of cancer annually, making it the second leading cause of death in the U. S. Cystic fibrosis is an inherited, fatal disease occurring once in every 2, 500 Caucasian births and once in every 17, 000 African American births. Genetic research has failed, so far, to solve many genetic-based cancers, but it has identified the gene and its location (on chromosome 7) responsible...
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Academic Search Elite Gays And Lesbians
2,011 wordsHomophobia in America Homophobia continues in our society, urban and rural, which is apparent in Michael Lassell's poem How to Watch Your Brother Die and in Neil Millers essay In Search of Gay America: Ogilvie, Minnesota. What are homophobic people afraid of? Do they know? Knowledge and awareness of homosexuality is the best way to prevent homophobia. According to Religious tolerance. com Homophobia has a variety of meanings, including hatred of homosexuality, hatred of homosexuals, fear of gays...
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Male Hormone Testosterone Sexual Orientation
2,012 wordsIs Sexuality a Biological or Cultural Process The aim of this essay, is to try and establish if sexuality, is an innate biological process that takes place as a result of our genetic make-up or wether sexuality is a result of our cultural back ground and the environment in which we are raised. These two differing theories are known as the nature / nurture debate, nature representing the biological theory for our sexuality and nurture representing environmental influences for our behaviour. The f...
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Centromere Of Each Chromosome Telophase Ii Meiosis
200 wordsMeiosis is the reproduction of sex or germ cells in which there are two divisions required to complete the process. They are called meiosis I and meiosis II. In meiosis I, members of homologous pairs of chromosomes divide into two complete sets. There are four stages: prophase I, metaphase I, anaphase I, and telophase I... -Prophase I is the first phase in meiosis I. At this point, the cell prepares itself for division. -In metaphase I, the centromere of each chromosome attaches to the spindle. ...
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X And Y Vitro Fertilization
1,447 wordsSex Preselection For many years, mankind has wondered how to choose the sex of a child before its birth for which countless myths, folk remedies, and magic potions have been offered as a solution. None of these methods were based on scientific evidence. However, in recent years gender selection has been made possible through advances such as preimplantation genetic diagnosis using biopsy methods combined with in vitro fertilization and sperm separation using flow cytometry techniques (Reubinoff,...
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X And Y Vitro Fertilization
1,469 wordsSex Preselection For many years, mankind has wondered how to choose the sex of a child before its birth for which countless myths, folk remedies, and magic potions have been offered as a solution. None of these methods were based on scientific evidence. However, in recent years gender selection has been made possible through advances such as preimplantation genetic diagnosis using biopsy methods combined with in vitro fertilization and sperm separation using flow cytometry techniques (Reubinoff,...
Free research essays on topics related to: gene therapy, genetic diagnosis, x and y, artificial insemination, vitro fertilization
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