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Free research essays on topics related to: chromosomes

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  • Viral Infection Host Cell
    851 words
    It all started with a little tickling in my throat. I forged ahead, knowing all too well what that feeling meant, I was getting sick. I convinced myself to just not think about it and it would just go away. This whole time there was an army of alien species amassing in my bloodstream and older cells. They are horrifyingly ugly, like something straight out of H. R. Geiger's imagination. They writhe and twitch while they are on the hunt for one of your precious body cells. One can almost imagine t...
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  • United States Constitution Life Begins At Conception
    1,246 words
    Abortion is defined as the termination of a pregnancy before the fetus is capable of independent life. Abortions must be conducted before the end of six months or the fetus will leave the womb and it would be considered premature birth. If the fetus weighs less than 18 ounces or is less than 20 weeks into pregnancy, it is usually considered an abortion. There are two types of abortions. One is spontaneous and the other is induced. Spontaneous abortions are known y another name, miscarriages. The...
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  • Tay Sachs Disease Sickle Cell Disease
    663 words
    Each year a number of children are born with biological defects that impair normal function. For THREE of the following conditions, discuss such aspects as the biological cause, the methods of treatment and possible means of detection and / or prevention. One lethal disorder inherited as a recessive allele is Tay-Sachs disease. This is caused by a dysfunctional enzyme that fails to break down brain lipids of a certain class. The symptoms usually become manifest a few months after birth. Some sym...
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  • The Human Genome Project
    727 words
    A genome is all the DNA in an organism, including its genes. Genes carry information for making all the proteins required by all organisms. These proteins determine, among other things, how the organism looks, acts, processes and fights infections. DNA is made up of four similar chemicals (bases, adenine , Thymine , cytosine , and guanine ) that are repeated millions or billions of times throughout a genome. The human genome has three billion base pairs. The order of these base pairs...
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  • Takes Place 1 N
    858 words
    Although Bryophytes and Pterophytes are both plant divisions with a common ancestor, they have little in common. While Bryophytes (mosses) are generally nonvascular and very short in height, Pterophytes (ferns) are vascular plants that usually grow much taller than mosses. While the dominant generation in mosses is the gametophyte, ferns exhibit the sporophyte generation. The details of their alternations of generation vary as well, although both have diploid and haploid stages. Alteration of ge...
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  • Studying The Human Genome Project
    801 words
    The Human Genome Project is a 15 -year international research program to find the estimated 80, 000 human genes and determine the sequence of the three billion DNA building blocks that underlie all of human biology and its diversity. The purpose of The Human Genome Project will characterize the genomes of human and selected model organisms through complete mapping and sequencing of their DNA. It will also develop technologies for genomic analysis and examine the ethical, legal, and social implic...
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  • Umbrella Cap Cell Dna Genetic Information Nucleus
    616 words
    A. Experiment 1: Developing a Hypothesis Interpret the Results 1. The cytoplasm in the cut off foot got the information it needed to rebuild an entire Acetabularia cell from the nucleus. The nucleus contains all of the DNA (genetic information) and can therefore control all other functions of the cell. It has ability to control growth and reproduction of a new cell based on the information stored in the nucleus. The cell will not change because the information in the nucleus is still there to re...
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  • Protozoa In 1834 Cells
    510 words
    1. Robert Hooke - In 1662, he observed tiny compartments in the cork of a mature tree and gave them the Latin name cellular (meaning small rooms). This was the origin of the biological term cell. 2. Anton Von Leeuwenhoek - By the late 1600 s, he had observed diverse protestant, sperm, even a bacterium - an organism so small it would not be seen again for another two centuries. 3. R. J. H. Dutrochet - French botanist who prepared plant cells and studied them between 1824 and 1830. He discovered a...
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  • Human Genome Project U S Department
    689 words
    Human Genome Project (HGP) is a scientific project, coordinated by U. S. Department of Energy and National Institute of Health. It started in 1993 and was completed in 2003. Projects main goals were: identification of genes in human DNA, determining DNA chemical sequences and storing information in HGP database, which is accessible to general public at projects website. The information that is found there can be divided in 5 categories: HGP information, scientific research database, related publ...
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  • Department Of Health Older Person
    1,596 words
    ... in the chromosomes, which are complexes of DNA and protein. At the end of the chromosomes there are regions of DNA that do not code for any of our characteristics but which appear to protect the chromosome. (Amador, 2000). As cells age, these regions of DNA, known as telomeres, become shorter. It is not known whether this is a cause or an effect of ageing. However, in cancer cells the length of the telomeres remains constant and they have high levels of an enzyme called telomerase, which rep...
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  • Law Of Segregation Recessive Allele Alleles
    336 words
    Gregor Mendel played a huge role in the underlying principles of genetic inheritance. He grew up in a Augustinian brotherhood where he learned agricultural training with basic education. He then went on to the Olmutz Philosophical Institute and then entered the Augustinian Monetary in 1843. After 3 years of theological studies, Mendel went to the University of Vienna where he was influenced by 2 professors, the physicist Doppler and a botanist named Unger. Here he learned to study science throug...
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  • Identical Twins Sexual Attraction
    770 words
    Does 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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  • Endoplasmic Reticulum Electron Microscope
    1,979 words
    Explain With Aid Of A Diagram The Explain With Aid Of A Diagram The Working Of The Electron Microscope The diagram below shows a picture of an electron microscope. This is a type of microscope that makes use of a beam of electrons rather than visible light. Because the wavelength of electrons is much smaller than the wavelength of visible light, an electron microscope not only gives a high magnification but it also has high resolution. This means that details can be seen clearly. An electron mic...
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  • Straight Line One Generation
    888 words
    Exploring Hereditary Traits My experiences working on this experiment haven t been easy as it could have been. I realized that waiting until the last minute and not following the assigned dates landed me in a stressed position that could have been prevented. Now I have more work than I had to begin with. My hypothesis is to determine the possible genotypes for some inherited traits. The dependent variables are the phenotypes and possible genotypes and phenotype; the independent variables are the...
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  • Chances Of A Miscarriage Situ Hybridisation Test
    233 words
    Flourescence in-situ hybridisation is a great advancement in technology because there are fewer chances of a miscarriage, the parents receive faster results, and the tests are easier to do. In the future, FISH will be able to decrease the chances of a miscarriage by using samples of maternal blood instead of amniotic fluid. The problem with amniocentesis is it uses a hollow needle to take fluid from the mothers uterus. The needle could damage the developing fetus if not inserted properly. Anothe...
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  • Male Or Female Male And Female
    1,553 words
    Is It a Boy or a Girl? On the surface, people tend to look at gender as a very definable yes or no matter and fail to see the variations that exist. Underneath the surface there exists a minority group who experience gender dysphoria: unhappiness or discomfort experienced by one whose sexual organs do not match ones gender identity. So, unless there exists an absolute distinction between identifying male from female, then classifying a transgender female as male is a product of gender identifica...
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  • Mentally Retarded Mental Retardation
    308 words
    Mental Retardation In order to be considered mentally retarded, you must have an IQ below 75, have significant limitations in two or more adaptive skill areas, and the condition is present from childhood (defined as age 18 or younger). People can be mentally retarded as all different levels. About 78 % of mentally retarded people will only be a little slower than the average person, while in others it is very apparent (Arc of New Jersey). There are many causes of mental retardation. One cause of...
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  • Plants And Animals Nuclear Membrane
    965 words
    Protista are Protista PROTISTA Protista are a group of mostly simple organisms, called protists, which have characteristics of both plants and animals. Most protists are unicellular and can only be seen with a microscope, although there are some that are composed of more than one cell. There are a wide variety of protists, and they live in many different environments, such as fresh water, seawater, soils, and the intestinal tracts of animals, where they perform crucial digestive processes. Like ...
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  • Gene Expression Normal Person
    485 words
    Dear Parents, I am writing you because I was informed that you have a child with the Prader-Willi Syndrome (PWS). I have recently been researching this disorder and want to give you some information about it that you may not yet know and suggestions that may help in maintaining your childs health and safety. Prader-Willi Syndrome is a two-stage non-hereditary genetic disorder that occurs in both male and females. The first stage is the mutation of gene expression, the second stage starts after t...
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  • X And Y Vitro Fertilization
    1,469 words
    Sex 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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