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21 St Chromosome Extra Chromosome
583 wordsDown 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...
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Spindle Fibers Opposite Sides
534 wordsMitosis is the process of nuclear division in a living cell by which the chromosomes are exactly replicated, the two parts being separated are given to the daughter nuclei. In this process the two daughter cells receive chromosomes that are alike in composition and equal in the number of chromosomes as the parent cell. Mitosis consists of four main stages. Mitotic division occurs in somatic (body) cells. The stages are prophase, metaphase, anaphase, and telophase. In interphase the cell seems to...
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Important To Understand University Of Texas
1,893 wordsAn Introduction To Telomere and Telomerase The telomere-telomerase hypothesis of aging and cancer is based on the findings that most human tumors have telomerase activity while normal human somatic cells do not. An emerging hypothesis is that the up regulation or re expression of telomerase is a critical event responsible for continuous tumor cell growth. In contrast to normal cells, tumor cells show no loss of average telomere length with cell division. Through this suggestion immortal ization ...
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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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Theory Of Evolution Life On Earth
1,611 wordsWe act like animals, we eat like animals, and we are animals. The many theories of evolution such as Darwin's theory of evolution prove to us that we choose to believe that we are not animals when we really are. Evolution is the sequential process of change over periods of time, which shapes and establishes the formation of modern man. In referring to evolution, the word means various changes. Evolution refers to the fabrication and development of life on earth. "Organic evolution" is the concep...
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Child With Down Syndrome People With Down Syndrome
1,218 wordsDown 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...
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Tightly Wrapped Around Proteins Wrapped Around Proteins Dna
658 wordsImagine... you are in charge of building a 200 -story skyscraper. The skyscraper has all of the newest technological features, and production has to start tomorrow. Would it happen? Of course not, you would need blue prints. This goes with your body, too. When you are born, your body has to know where everything has to go. You know, a muscle cell goes to your biceps; a (fried) brain cell goes up in to the attic. That is what chromosomes are. I am going to talk about chromosomes. They are your ge...
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Gene Therapy Sexual Reproduction
1,087 wordsRELATIONSHIP BETWEEN HEREDITY AND DNA 1. DNA Polymerase Not Perfected by Evolution What are passed on by parents to their children are sets of genes in the chromosomes and these interact with the environment where they are found (Genetic Science Learning Center, 2005). Given the proper environmental conditions, the genes can be expressed fully in an organism. Offspring's do not inherit a trait but the genes that control the appearance of that trait. Genes can be fully expressed if the proper env...
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Serotonin Reuptake Inhibitors Obsessive Compulsive Disorder
3,264 wordsBrain Chemistry and Recent Advances The mysteries surrounding the complexity of the brain and how it works has led scientists in diverse fields to search for answers. Chemicals in the brain and the reactions that take place are being understood now more than ever due to continuing research in genetics, pharmacology, and mental illness. Study and research in genetics has helped identify some of the genes involved in producing, receiving, or sending certain chemical reactions, the way they work, a...
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Parent Bio Bugs Gametes Are Called Chromosomes
295 wordsBio bugs The bio bugs were a great example of cell reproduction and heredity. In this essay I will discuss all the concepts of cell reproduction and heredity as they apply to the bio bugs. The parent bio bugs had four gametes. These gametes showed the same traits as their parents, which is an example of heredity. Heredity is the passing of traits from parent to offspring. The hereditary information is carried on chromosomes. Chromosomes are rod shaped and are only visible when the cell is going ...
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Chromosomes That Determine One Of The Chromosomes Sex
230 wordsBiology Chapter 8 OutlinChromosome: one of the chromosomes that determine a sex; sex chromosomes Y Chromosome: one of the chromosomes that determine sex, Sex chromosome Sex chromosomes: because the two chromosomes differ between the sexes, we call them sex chromosomes. Autosomes: chromosomes not related to an organisms sex Sex-linked characteristic: trait whose genes are carried on the X chromosome Nondisjunction: failure of homologs to segregate during meiosis. Chromosome theory of heredity: th...
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Children With Down Syndrome Child With Down Syndrome
1,179 wordsDown 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...
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People With Down Syndrome Children With Down Syndrome
1,090 wordsDown Syndrome Introduction What is down syndrome, is it a birth defect or is it a disease. Well actually its a genetic disorder caused by the duplication of all or parts of the 21 st chromosomes. In our society is it fair to be treated differently just because you have genetic disorder. What causes them to be so different. Is it the way they look or is it the way they talk. What can a society do to those that are affected by this disorder. Is it possible to cure this disorder? As we further go t...
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Human Genome Project Dna Fragments
1,943 wordsGene Mapping began when the U. S. Government held a conference to explore if DNA damage occurred in people exposed to low levels of radiation in Japan after the 1945 Atomic Bombs. There, scientists quickly realized that observing the human genome could be useful in discovering environmental mutates. Shortly afterwards, Renato Dulbecco revealed the entire sequence of human DNA and had a great impact on cancer research (Purves, et al. 1998). In 1990, scientists from around the world began the Huma...
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Generation To Generation Gregor Mendel
1,312 wordsWhat is Genetics? Genetics is usually defined as the transmission of traits from one generation to the next. Although correct in its meaning, the definition is rather vague. Genetics not only involves the transmission of traits from generation to generation, but it also involves every biological occurrence in an organism. The history of genetics, beginning with the ideas of Aristotle up till the rediscovery of Mendel's work, has gone through many changes both in theory and discovery. The history...
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Important To Remember Males And Females
3,107 wordsHuntington's disease is an inherited neurodegenerative disorder. It is passed from parent to child in an autosomal dominant manner (Berkon, pg. 1493), meaning you need only one copy of the gene to inherit the disease. This is in contrast to an autosomal recessive disorder which requires two altered genes to inherit the disorder or an altered gene from each parent (Hayden, pg. 11). If you have the gene and live long enough, you will eventually develop HD and each of your children has a 50 % chanc...
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Division Takes Place Mitosis And Meiosis Chromosomes
225 wordsMitosis and Meiosis: how they are similar and different Mitosis and Meiosis are alike in many ways essentially they are both forms of cellular reproduction. Both go through similar cellular division stages. Interphase, Prophase, Metaphase, Anaphase, Telophase, and Cytokinesis all occur in both Mitosis and Meiosis. Within each stage there are many similarities as well. In Prophase the cell wall begins to disintegrate, the nucleus disappears, chromosomes condense, spindles begin to from, and the k...
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Nuclear Membrane Daughter Cells
471 wordsMitosis evolved in complex plants and animals for growth and repair. Mitosis, the division of a cell resulting in two identical daughter cells, prolongs an organism s life by replacing old, dead, and damaged cells. In complex animals and plants, mitosis occurs everywhere, except sex cells. Meiosis evolved in complex plants and animals to increase variation in offspring and to maintain the number of chromosomes from generation to generation. Meiosis occurs in the sex cells of organisms, specifica...
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Mental Retardation Extra Chromosome
1,780 wordsTHEKlinefelter 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...
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Gregor Mendel Second Law
1,343 wordsGregor Mendel was an Augustinian nineteenth century monk who, due to a series of momentous experiments, is now widely regarded as the forefather of genetics. Mendel studied the inheritance of seven contrasting characteristics of the species Pisum sativum, more commonly known as the garden pea. Each of the variables that Mendel experimented with were discontinuous; there were no intermediate forms. For example, one of the variables was length of stem, which was always either tall or short. From h...
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