X Chromosomes essay topics
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Injections The Female Victim Of Turner Syndrome
1,158 wordsTurner Syndrome There are many possible reasons why a child may grow slow, including: hereditary factors, hormone imbalances, severe stress or emotional deprivation, infections in the womb before birth, bone diseases, and genetic or chromosomal abnormalities. American doctor Henry Turner recognized a pattern of short stature and unfinished sexual maturation in otherwise normal females. He published a comprehensive medical description of the syndrome. Turner's syndrome is a rare chromosomal disor...
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Turner's Syndrome A Chromosomal Disorder
813 wordsK alene Szymczak January 22, 2000 Adv. Biology Turner Syndrome Turner's Syndrome- (Webster's definition) A chromosomal disorder resulting in a syndrome characterized by specific dysmorphic features (short stature) and organ malformations (gonadal dysgenesis) Turner's Syndrome- (Anastasia and Rosebud's def.) "It's something that makes me different from other people. It's something that I'm proud of, and ya know what I have a pretty normal life". When I was assigned this report, I decided to do a ...
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Spindle Microtubules And The Chromosomes
1,649 wordsMore than one celled organisms grow by way of mitosis and the cytoplasmic division of body cells. On the other hand, meiosis occurs only in germ cells, which are put aside for the formation of gametes (sperm and egg). Reproduction by meiosis allows for species survival and it increases genetic variability. The process, during which the germ cells are generated is called meiosis. It represents nature's solution to the problem of chromosome doubling that would occur, if two diploid cells, i.e. two...
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Two X Chromosomes And Males
842 wordsWere more boys or girls born to atomic-bomb survivors Normally, somewhat more pregnancies terminate in boys than girls in all populations, and this normal preponderance of male births has not been demonstrated to be significantly altered when the parents (one or both) were exposed to atomic radiation. However, when the genetic studies began, it was believed that a person's gender was simply determined. Individuals inheriting an X chromosome from their father and one from their mother were destin...
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Nettie Stevens
333 wordsNettie Stevens Nettie Maria Stevens was born in 1861 in Cavendish, Vermont. She was an American biologist and geneticist, whose research proved that chromosomes determine the sex of an organism. She completed in only two years the four-year course at Westfield Normal School in Massachusetts. Nettie graduated with the highest academic scores in her class. She relieved her B.A. in 1899 and her M.A. in 1900 at Stanford. Nettie studied Tenebrio monitor beetles and found that unfertilized eggs in fem...
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Same Side Effects As Klinefelter Syndrome
865 wordsKLINEFELTER SYNDROME Klinefelter Syndrome is a syndrome in which a person has an additional X-chromosome. It is not life consuming, but rather people who have this syndrome can live perfectly normal lives proper treatment and care. If precautions are taken early on. Dr. Harry Klinefelter and his co-workers at Massachusetts center hospital in Boston in 1942 first identified the syndrome. These men were of the first to publish a report on this syndrome in its whole, so as to not leave any question...
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Exceptional Eggs With Two X Chromosomes
1,385 wordsThe male of many animals has one chromosome pair, the sex chromosomes, consisting of unequal members called X and Y. At meiosis the X and Y chromosomes first pair, then disjoin and pass to different cells. One-half of the gametes formed contain the X and the other half the Y chromosome. The female has two X chromosomes, and all egg cells normally carry a single X. The eggs fertilized by X-bearing spermatozoa give females (XX), and those fertilized by Y-bearing spermatozoa give males (XY). The ge...
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Behavioral Features Of Fragile X Syndrome
587 wordsFragile X Syndrome is an inherited genetic condition associated with mental retardation. It is caused by a mutation of the "X" chromosome. Fathers cannot pass the disease onto their sons, because females always give an "x" chromosome where a man gives either an "x" or a "y". If a man gives a "y" chromosome, then the result is a boy baby, and since the disease is only carried in the "x" chromosome, a boy can only inherit this disease from his mother. A girl, on the other hand, can inherit the dis...
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Gene In The Region Of The X
2,175 wordsThe History of the Disorder In 1875, Charles Darwin found a new disorder that appeared in each generation of a family, affecting some of the male members and not others. This condition was more prominent in very young people. Darwin also found that the daughters were never affected although they could transmit the disease to their sons, although no males have ever transmitted the disease to their sons. Darwin started the research that led to the discovery of the gene for anhidrotic ectodermal dy...
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Defective Gene In Dmd And Bmd
2,230 wordsWhat is Muscular Dystrophy The muscular dystrophies are a heterogeneous group of genetic muscular diseases, which have three features in common: they are hereditary, they are progressive (ie get worse over time) and each produces a characteristic selective pattern of weakness of muscle groups. (Engel 1994) There are a number of such diseases: Duchenne muscle dystrophy (DMD) Becker type Emery-Dreyfuss type Facioscapulohumeral type Limb-girdle muscular dystrophies Congenital muscular dystrophies S...
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Extra X Chromosomes B Physical Enlarged Breasts
392 words9 men with enlarged breasts, scanty facial / body hair, small testes, and infertility Klinefelter Syndrome I. History A. 1942, report published Klinefelter et al 9 men with enlarged breasts, scanty facial / body hair, small testes, and infertility B. 1959, condition named Klinefelter syndrome Men had extra sex chromosome (XXY), instead of XY C. Klinefelter is most common male chromosomal disorder linked to infertility and hypogonadism (small testes) II. Genetic information A. Typical karyotype: ...
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