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Free research papers and essays on topics related to: meiosis

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  • More Than One Celled Organisms Grow By Way Of Mitosis And The Cytoplasmic Division Of Body Cells On The Other Hand, Meiosis O - 1,541 words
    More 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 cells with a double set of chromosomes would fuse. Accordingly does meiosis produce haploid germ cells, with maternal and paternal germ cell fusing at fertilization and thus generating a diploid fusi ...
    Related: cell division, division, meiosis, mitosis, organisms
  • 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 Test Questions - 294 words
    Biology Test Questions Question 1 (10 points) Chromatids are 1. attached at the centriole. 2. a pair of chromosomes, one from the mother and one from the father. 3. attached at their centromeres. 4. identical until crossing over occurs. 100.0% 5. both 3 and 4 are correct Score: 10.0 / 10.0 Question 2 (10 points) Different, or alternative, forms of the same gene are called 1. genetomorphs. 100.0% 2. alleles. 3. mutants. 4. chromatids. 5. homologous. Score: 10.0 / 10.0 Question 3 (10 points) If a diploid organism has a genome consisting of 4(four) chromosomes, it can produce different combinations of maternal and paternal chromosomes in the offspring (disregarding crossing over). 1. 4 2. 8 3. ...
    Related: biology, gene expression, reproduction, chromosomes
  • Career Review: Pharmacist - 1,307 words
    ... dynamics 1 (CHEM254), Organic Chemistry2/Laboratory (CHEM 265/265L), Physics2/Laboratory (PHYS112/112L), (Third year) Advanced Cell Biology (BIOL 331), Physical Biochemistry (CHEM 357), Synthetic Organic Chemistry/Laboratory (CHEM 360/360L), Molecular Biology (BIOL330), Metabolism 1(CHEM333), Advanced Biochemistry Laboratory (CHEM334L), Elementary Statistics for biology (STAT202), And four elective courses, (Fourth year) Elective courses chosen from Group A, B, and C (Seven credits from Group A, B, and C, with at least 5.5 credits from Group A and B, of which are not less than 4.0 credits are from Group A). Group A: (BIOL 342) Molecular Biotechnology 1, (BIOL 428) The Molecular Genetics ...
    Related: pharmacist, social issues, drug therapy, unemployment rate, structural
  • Chapter 10 Definitions - 556 words
    Chapter 10 Definitions autosome: any chromosome other than the sex chromosome base deletion: a mutation in which a nucleotide is lost from the DNA sequence base insertion: a mutation in which a nucleotide base is added to the DNA sequence carrier: an individual who is heterozygous for a recessive trait chromosome mapping: a method of determining the relative position of genes on a chromosome using information on crossover frequency crossing over: exchange of parts between two homologous chromosomes deletion: a mutation in which a chromosomal piece breaks off and is lost frame-shift mutation: a mutation in which a base deletion or insertion cause the genes message to be translated incorrectly ...
    Related: turner syndrome, sickle cell, cell disease, error, syndrome
  • Chemical Warfare - 1,216 words
    Chemical Warfare Chemical Warfare In this report I will be giving a history of chemical warfare. I will also be showing a chart that includes the Agent, and many other useful information about nerve gas agents which are the main item for chemical warfare. This report will also include the effects of nerve gas on the human body. Chemical Warfare is an extremely dangerous form of warfare. An inquisitive scientist accidentally stumbled upon the engineering of nerve gas agents in the 30s by the name of Gerhard Schrader. He was working on a solution to the troublesome insects in Germany when he stumbled onto a solution for a larger problemhumans. With World War II less than a decade later the Ger ...
    Related: chemical engineering, chemical warfare, chemical weapons, warfare, human body
  • Chemistry Research - 2,013 words
    ... ng; use tissue rich in Mit/blood supply and Thermogenin. COLD vs HOT- Fig. 37.21 THERMAL INSULATION AND RATE OF HEAT LOSS = Thermal energy is release by body to it's environment = Muscle contraction or change blood flow to skin; WOLF-constrict Blood vessel in its feet at above 0 C = Elephant, Rhinos, water Buffaloes have thick layer of fur; so they wallow in water = Sweating, panting are last resort use bu animals in hot climate or habitat (H2O evaporate quickly) THE VERTEBRATE THERMOSTAT- Fig 37.22/37.23 = All animals that thermoregulate must have a regulatory system; Info get from Hypothalamus-integration center In Humans: If glands is cool BT rises (constriction of Blood vessels and i ...
    Related: chemistry, body weight, biological clock, genetic diversity, orange
  • Gregor Mendel - 585 words
    Gregor Mendel subject = biology title = Gregor Mendel Gregor Mendel played a huge role in the underlying principles of genetic inheritance. Gregor was born, July 22 1822 in Heinzendorf, Austrian Silesia (now known as Hyncice, Czech Republic), with the name Johann Mendel. He changed his name to Gregor in 1843. He grew up in an Augustinian brotherhood and he learned agricultural training with basic education. He then went on to the Olmutz Philosophical Institute and later entered the Augustinian Monastery in 1843. After 3 years of theological studies, Mendel went to the University of Vienna, where 2 professors influenced him; the physicist Doppler and a botanist named Unger. Here he learned to ...
    Related: gregor, gregor mendel, mendel, basic education, czech republic
  • Intelligence: Genetic And Environmental Factors - 1,957 words
    ... ay not be passed down because they are broken up at meiosis and a new genotype is formed at conception. One of the consequences of the Human Genome Project, tasked with sequencing the entire human complement of DNA, is a public perception that scientists are developing a molecular understanding of the human condition. Seldom a month goes by without a media article trumpeting a new genetic link to a behavior or disease. Everything from schizophrenia to television watching is postulated to be linked to genetics, yet scientists are a long way from being able to explain the ramifications of the human genome sequence. Kaye (1992) suggests that phrasing used by the media such as gene for alcoh ...
    Related: biological factors, cultural factors, environmental, environmental factors, environmental influences, genetic
  • Mitosis Cell Lab - 1,293 words
    Mitosis Cell Lab I Mitosis Cell Lab II. Introduction Life exists almost every where on this planet and if we are to attempt to comprehend what life is in all of its magnificence we must look at its simplest forms. Even a cell, the smallest form of life known is extremely complex. All life begins as a single cell. I can not begin to understand the depth of what it takes for one cell to multiply and change until we become conscious of ourselves. There are two types of cell division, Meiosis and Mitosis. Meiosis is where a cell splits and becomes four different cells. Mitosis is the process that allows a cell to split into two identical cells. This happens by having all of the DNA replicate bef ...
    Related: cell, cell division, mitosis, experimental procedure, population growth
  • Parasites And Their Virulence - 1,258 words
    ... d eventual collapse (Georgi and Georgi 1990). Host immobility increases the opportunities for female mosquitoes to find and feed upon hosts (Read and Harvey 1993). Infected dogs have large numbers of D. immitis microfilaria in their circulatory systems, again increasing the likelihood of ingestion by the insect. Many infected dogs eventually die from heartworm, but in the process the parasite has ensured transmission. Similar debilitating effects have been observed in tapeworm-stickleback interaction; infected sticklebacks must swim nearer the water's surface due to an increased rate of oxygen consumption caused by the parasite (Keymer and Read 1991). Parasitized sticklebacks are more li ...
    Related: parasites, virulence, over time, arms race, evolution
  • Reproduction Process - 2,027 words
    ... liography ENCYCLOPDIA BRITANNICA reproduction process by which organisms replicate themselves. In a general sense reproduction is one of the most important concepts in biology: it means making a copy, a likeness, and thereby providing for the continued existence of species. Although reproduction is often considered solely in terms of the production of offspring in animals and plants, the more general meaning has far greater significance to living organisms. To appreciate this fact, the origin of life and the evolution of organisms must be considered. One of the first characteristics of life that emerged in primeval times must have been the ability of some primitive chemical system to mak ...
    Related: reproduction, life cycle, deoxyribonucleic acid, deoxyribonucleic acid dna, formulating
  • Sickle - 2,157 words
    ... LAST PAGE) Inheritance of hemoglobin genes from parents with sickle cell trait and thalassemia trait. As illustrated, the couple has one chance in four that the child will have the genes both for sickle hemoglobin and for thalassemia. The child would have sickle -thalassemia. The severity of this condition is quite variable. The nature of the thalassemia gene (o or +) greatly influences the clinical course of the disorder. Another disorder that interacts with sickle cell disease is "hemoglobin SC disease". The abnormal hemoglobin C gene is relatively harmless. Even people with two hemoglobin C genes have a relatively mild clinical condition. When hemoglobin C combines with hemoglobin S, ...
    Related: sickle, sickle cell, first year, cystic fibrosis, mention
  • The Making Of The Cat - 2,285 words
    The Making Of The Cat R. Roger Breton Nancy J Creek ------------------------ Soup or Sandwich IN THE VERY BEGINNING, about 4.6 billion years ago (give or take a few years), a small ball of rock, water and gas had come to be and immedi- ately set about the process of combining its atoms into more and more complex arrangements. Thus began that most wondrous story, the evolu- tion of life on Earth. For the first 2.1 billion years of the Earth's existence, the Archeo- zoic Era, life very slowly evolved. The Earth's crust was still in flux and covered for the most part by shallow seas. The atmosphere was composed primarily of methane, ammonia, carbon dioxide and water vapor. From these primitive ...
    Related: significant events, double helix, central nervous, eggs, radical
  • Turner Syndrome - 1,100 words
    Turner Syndrome annon There are many possible reasons why a child may grow slowly, including: hereditary factors (short parents), diseases affecting the kidneys; heart, lungs or intestines; hormone imbalances; severe stress or emotional deprivation; infections in the womb before birth; bone diseases; and genetic or chromosomal abnormalities. The Turner Syndrome (known as Ullrich-Turner Syndrome in Germany) is a congenital disease. A German doctor named Ullrich published his article in 1930. American doctor Henry Turner recognized a pattern of short stature and incomplete sexual maturation in otherwise normal females. He published a comprehensive medical description of the syndrome. It was no ...
    Related: syndrome, turner, turner syndrome, heart disease, different ages
  • Turners Syndrome - 240 words
    Turner's Syndrome Turners Syndrome Turners Syndrome is a common disease in females that affects many body systems. It affects about out of 2,000 females. This genetic disorder is characterized by the lack of sexual development at puberty. Although the exact cause of Turners Syndrome isnt know, it is believed that the disorder may result from an error during the division of a parents sex cells known as meiosis. Turners Syndrome is a defiency in the amount of genetic material on the X-chromosome, one of the two-sex chromosomes. In some cases of Turners Syndrome, one X chromosome is missing from the cells. In other affected females, both X chromosomes may be present, but one may have genetic de ...
    Related: syndrome, recent studies, problems associated, human growth, sample
  • Turners Syndrome - 737 words
    Turners 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 little more than the average person does. When I was doing all of the research, I wondered what it would be like to have TS. Well, through the wondrous powers of the Internet, I was able to take a peek at TS by talking to two young women who have it. What did they ...
    Related: syndrome, young child, chat room, young women, bilateral
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