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Free research papers and essays on topics related to: cell division

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  • Downs Syndrome, Turners Syndrome, And Redgreen Color Blindness - 682 words
    1.) Three genetic disorders are Down's syndrome, Turner's syndrome, and Red-green color blindness. They are all caused by undesirable genes inherited by normal genetic mechanisms. These mutations are usually recessive because dominant ones usually die. Turner's Syndrome is caused by faulty cell division known as non disjunction. This occurs when chromosomes fail to separate. IN this disorder, the affected have one "x" chromosome. The effect are an underdeveloped female, mental retardedness, and sterility. Down syndrome is a condition caused by an oddosome that occurs on the pair #21. It results in severe abnormality physical and mental defects. For example, shorter bubble-shape eyes, short f ...
    Related: blindness, down syndrome, downs, cell division, external environment
  • Abortion - 1,028 words
    Abortion Abortion As of right now, abortion is legal in all nine months of the pregnancy for any reason. This controversial issue is a question of how important the value of life is. The turning point came in 1973 when the Supreme Court's decision in Roe vs. Wade saying, that women have the right to murder an innocent child only up to 24 weeks. This false perception is fueled part by groups supporting abortion rights and it is then uncritically unaccepted by the media. The fact is that the current law allows a woman to get an abortion for any reason she deems necessary. It seems ironic that a people can get so emotional when it comes to animal rights, yet see no wrong in ripping a developed ...
    Related: abortion, partial birth abortion, partial-birth abortion, animal rights, controversial issue
  • Aging Theories - 1,709 words
    Aging Theories This report outlines the main theories of how the process of aging works. Since researchers have not discovered a universally-accepted theory of aging, the theories discussed are potential explanations of how we age. The likelihood of each hypothesis is considered roughly equal. The different theories discussed focus on the workings of different parts of the body, from the molecular level of DNA mutations and replication, to the organism level of becoming "worn out." Aging is a very complex and gradual process, and its ongoing operation is present to some degree in all individuals. It is a journey to the maturity, as well as to the degeneration of the body. Because aging affec ...
    Related: aging, aging process, cell division, free radicals, gradual
  • Alzheimer's: Is There A Cure - 1,058 words
    ... y, 2001). Johnson & Johnson say that the drug will be available starting in May. Another approach to finding a cure for Alzheimer's Disease is finding something that will block molecules that are possibly responsible for the disease. Bob Vassar designed and implemented an ingenious method for isolating the gene for an enzyme called beta-secretase, which is found to be a key culprit in the disease (Garber, 2001). While other drugs that are approved only improve the functions of those with the disease, this method could actually stop the progression, not just slow it down. There are some drawbacks to this method. What is not known about the enzyme beta-secretase, though seemingly linked to ...
    Related: cure, spend time, social change, federal drug administration, psychosis
  • Anatomy Of A Muscle Cell - 1,017 words
    Anatomy Of A Muscle Cell John Centore1 Anatomy and Physiology Dr. Jain Anatomy of Muscle Cells There are three types of muscle tissue in the human body. These muscle tissues are skeletal muscles, smooth muscles and cardiac muscles. Each of these muscle tissues has it very own anatomical makeup, which vary from muscle to muscle. The muscle cells in a muscle are referred to as muscle fibers, these fibers are skeletal muscle fibers, smooth muscle fibers and cardiac muscle fibers. The anatomy of a skeletal muscle fiber is formed during embryonic development. Skeletal muscle fibers arise from a hundred or more small mesodermal cells called myoblasts. The mature skeletal muscle fiber has a hundred ...
    Related: anatomy, anatomy physiology, cell, cell division, muscle, muscle growth
  • Anthropolgy - 1,276 words
    Anthropolgy Anthropology- the study of humankind everywhere, through time, seeks to produce reliable knowledge about people and their behavior, both about what makes them different and what they have in common. What They Do- Physical anth- study humans as biological organisms, tracing there evolutionary development of the human animal and looking at biological variations within the species, past and present (human evol, Primates, Human diversity. Cultural Anth- is concerned with human cultures, or the ways of life in societies. Culture bound- Theories about the world and reality based on the assumptions and values of ones own culture. Within the field of cultural anth are Archaeologist- Is t ...
    Related: blue eyes, common culture, human diversity, assign, volcanic
  • Bacteria Outline - 1,338 words
    Bacteria Outline Bacteria - Oldest, structurally simplest, most abundant forms of life - Only organism with prokaryotic cellular organization - The only members of the kingdom Monera (4800 different kinds) - Characteristics change depending on growth conditions - Maintenance of life depends on them - play vital role of productivity and as decomposers - Capable of fixing atmospheric N for use by other organisms - Used in production and fermentation of various food and as antibiotics and is being tested for insect control - Prokaryotes vs. Eukaryotes - Multi-cellularity - All bacteria fundamentally single celled - Sometimes cells adhere within a matrix to form filaments - Activities of bacteri ...
    Related: bacteria, outline, food poisoning, flowering plants, acid
  • Biology And Human Evolution - 1,381 words
    Biology And Human Evolution Human Biology and Evolution Humans are Alive The earliest human life form can be traced back more than 3.5 billion years ago. Humans are said to be descendants of a single celled ancestor. Although they are different in size and shape all basic functions are alike. The more complex the organization of the cell became the more successful and developed it became. As these single celled organisms developed they became known as pre-humans. We share many characteristics with these pre-humans. Some of these characteristics include the masters of heredity DNA and RNA as well as proteins composed of amino acids, membranes or bound cells and lastly controlled cell division ...
    Related: biology, evolution, human biology, human brain, human evolution, human life
  • Brca Brca - 2,511 words
    Brca1 & Brca2 Are Women More Susceptible to Breast and Ovarian Cancer If a Mutation in BRCA1 and BRCA2 is Found Breast and Ovarian cancer are the two most common kinds of cancers found in women in the United States. An estimated 90-95% of cancer cases are believed to be environmental and lifestyle related. The remaining five to ten percent of these types of cancers may be caused by inherited genetic mutations. The existence of a breast cancer susceptibility gene known as BRCA1 and its approximate location on human chromosome 17 have been known for about 4 years, on the basis of retrospective family studies. But only since 1994 have scientist actually been able to isolate and sequence the gen ...
    Related: breast cancer, cancer research, more prone, mutated, rough
  • Breast Cancer - 1,346 words
    ... tive risk of breast cancer. Those who have more than nine drinks a week have an increase of two and a half times the rate of breast cancer for a non-drinking person. In 1987, the National Cancer Institute published a report comparing 1524 women with breast cancer against a control group of 1896 without the disease. Again, alcohol appeared to promote breast cancer (Risk Factors for Breast Cancer). Several medical procedures or side effects of them have been thought to promote breast cancer. It was hypothesized that self-induced abortions could greatly increase the chances of getting cancer, as during pregnancy the cells in the breast quickly divide and reproduce. By having an abortion and ...
    Related: american cancer, breast, breast cancer, cancer, cancer institute, cancer prevention, cancer society
  • Breast Cancer - 1,682 words
    ... Cleveland added green tea to cultured cells of human lymphoma, prostate, breast and skin cancers. Amazingly, the tea killed every cancer cell, but did not harm a single normal functioning cell. Gianluca Lazzaro at the University of Illinois made a synthetic form of vitamin D5 that killed cancer cells in a lab culture. The University of Western Ontario found limonoids more effective than flavanoids in halting growth of cancer cells. Limonoids, true to the name, are responsible for the bitterness of lemons, limes, oranges, and grapefruit. Walt Willet of the Harvard School of Public Health conducted a study of 89,538 nurses between the ages of 3459. He found for those that consume hard liq ...
    Related: american cancer, breast, breast augmentation, breast cancer, breast implants, cancer, cancer center
  • Breast Cancer - 1,598 words
    Breast Cancer Hereditary breast cancer is a disease caused by mutations on breast cancer suppresser genes (ACCV Pg.17). Mutations allow normal cells to divide abnormally (ACCV Pg.13). Resulting cells divide faster as they do not specialize and form useless lumps of cells called malignant tumours (ACCV Pg.13). Genetic Screening is the process where Deoxyribonucleic Acid (DNA) fragments are analyzed for a specific gene. The purpose is to identify individuals carrying disease causing genes so they can change their life style and also help invent a cure (ACCV Pg.20). This is done by amplifying DNA withdrawn from an individual, then specific gene mutations are targeted using the Electrophoresis p ...
    Related: breast, breast cancer, cancer, fact sheet, clinical practice
  • Cancer - 668 words
    Cancer Good morning ladies and gentlemen, my colleagues and I have called you in at such short notice because we need to discuss a patient who was brought to our attention earlier this week. The patient presented with rapidly progressing lymphadenopathy, subsequent examination lymph nodes congested with many small B-lymphocytes. The B-lymphocytes showed a significant chromosomal aberration in the form a 14;18 translocation. The patient has been diagnosed with lymphoma and has been prescribed an immediate course of chemotherapy. This mornings presentation will include a short description of the cell cycle and how and where certain checkpoints of genomic integrity function. My colleagues Assoc ...
    Related: cancer, good morning, protein synthesis, cell division, mutation
  • Cancer - 262 words
    Cancer Hippocrates gave cancer ( Greek for crab ) its name because it spread through tissues like the movements of a crab. At first oncogenes, genes with highly specialized functions were said to be the " cancer genes ". This of course was wrong as oncogenes promote normal cell division and growth as well as the repair and replacement of damaged cells. Cancer starts when one out of as many as one trillion cells goes awry. When first damaged the cell loses its external controls and then the internal controls defect. From this it tries to develop a new set of internal controls by multiplying at a rapid pace which spreads colonies throughout the body. Cancer has been said to have two steps: mut ...
    Related: cancer, cell division, blood, hippocrates
  • Cancer In Detail - 1,070 words
    Cancer In Detail Discuss social, ethical and biological issues associated with cancer Cancer is one of the most complex and devastating diseases that claim the life of many humans. Today there are one in three people worldwide who are affected by cancer, and almost 60% of these people will almost certainly die. 7000 New Zealanders die every year from this disease. It is the second largest killer next to heart disease. Cancer does not just affect certain groups of people, it can affect anybody and it is not just one disease, it refers to more than a hundred diseases. Cancer is caused by carcinogens. At present, hundreds of chemicals are known to induce cancer. Normally, the bodys cells divide ...
    Related: breast cancer, cancer, colon cancer, lung cancer, prostate cancer
  • Cells Of The Human Body - 2,250 words
    Cells Of The Human Body Cells are the basic living units of all plants and animals. The cell is the structural and functional unit of all living organisms. There are a wide variety of cell types, such as nerve, muscle, bone, fat, and blood cells. Each cell type has many characteristics, which are important to the normal function of the body as a whole. One of the important reasons for maintaining hemostasis is to keep the trillions of cells that form the body functioning normally. An averaged size cell is one-fifth the size of the smallest dot you can make on a sheet of paper with a sharp pencil. Although cells may have quite different structures and functions, all cells share some common ch ...
    Related: blood cells, cell division, human body, genetic information, deoxyribonucleic acid dna
  • Cells Of The Human Body - 2,204 words
    ... lum of skeletal muscle stores calcium ions that function in muscle contraction. GOLGI APPARATUS The Golgi apparatus is composed of flattened membranous sacs, containing cisternae, that are stacked on each other like dinner plates. The Golgi apparatus modifies, packages, and distributes proteins and lipids manufactured by the rough and smooth endoplasmic reticula. Proteins produced at the ribosomes of the rough endoplasmic reticulum are surrounded by a vesicle, or little sac, that forms from the membrane of the endoplasmic reticulum. The vesicle moves to the Golgi apparatus, fuses with the membrane of the Golgi apparatus, and releases the protein into the cisterna of the Golgi apparatus. ...
    Related: blood cells, cell division, human body, white blood cells, health care
  • Cloning Benefits - 1,742 words
    Cloning Benefits Cloning Benefits What if while walking down the street you encountered someone who looked exactly like you? Would you stare in amazement or would your heart be filled with fear? At first some people may look upon the idea of cloning with disgust and question themselves if humans should play God while others would be interested and study the many possibilities that cloning offers. This illustrates the path that cloning has taken over the latter part of the twentieth century. At first, when cloning was brought up in conversations, people tended to fearfully think of an army of identical persons marching across the earth in hopes of ruling humans. This and many other absurd not ...
    Related: cloning, human cloning, vitro fertilization, growth hormone, fertilization
  • Cloning What Is It - 872 words
    Cloning what is it? Cloning What is Cloning? Cloning is the production of one or more individual plants or animals that are genetically identical to another plant or animal. Nature itself is the greatest cloning agent. In about one of every 75 human conceptions, the fertilized ovum splits for some unknown reason and produces monozygotic (identical) twins. Each has a genetic makeup identical to the other. Two very different procedures have been referred to as cloning: Embryo cloning has been successfully carried out for years on many species of animals. Some limited experimentation has been done on human embryos. Adult DNA cloning has been used to clone a sheep, but was not tried on humans ...
    Related: cloning, cancer research, endangered species, cambridge university, texas
  • Dna - 685 words
    Dna What is DNA? Nucleic acid is a complex molecule found in all cells. There are two types of nucleic acids, deoxyribononucleic acid (DNA) and ribonucleic acid (RNA). DNA is found mainly in the nucleus of cells. RNA may be found throughout the cell. Even bacterial cells which do not have a nucleus, contain both DNA and RNA. Viruses, however, have only RNA or only DNA. DNA plays a vital role in heredity and cell development. It is the substance in genes, the hereditary material that determines an organisms characteristics. Genes are located in chromosomes, the threadlike structures in the nucleus. When a cell divides, its chromosomes and genes are duplicated exactly and passed on to the two ...
    Related: cell division, double helix, invasion of privacy, properly
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