define: parthenogenesis
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Dictionary Definition Parthenogenesis is a form of asexual reproduction in which females produce eggs that develop without fertilization. Parthenogenesis is seen to occur naturally in aphids, daphnia, rotifers, and some other invertebrates, as well as in many plants.
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- Oogenesis, ovogenesis, or ooegenesis /oögenesis.ˌoʊ/ əˈdʒɛnɨsɪs is the creation of an (ovum egg). Cell it is the female form of; gametogenesis the male equivalent is. Spermatogenesis it involves the development of the various stages of the immature. ovumogenesis starts with the process of developing oogonia, which occurs via the transformation of primordial follicles into primary oocytes, a process called oocytogenesis.
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Morphogenesis Morphogenesis (from the Greek morphe morphê shape and genesis, creation, literally beginning of the) shape is the biological process that causes an organism to develop its. Shape it is one of three fundamental aspects of developmental biology along with the control of cell growth and cellular. differentiationorphogenesis arises because of changes in the cellular structure or how cells interact in tissues. These changes can result in tissue elongation, thinning, folding or separation of one tissue into distinct layers. The latter case is often referred as cell sorting.
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What is oogenesis? Oogenesis is the process in which the primary oocyte turns to an ovum undergoing meiosis. At first there is a diploid oocyte called the primary oocyte. Meiosis I occurs in which synapsis occurs and tetrads form and crossing over as well and this becomes the secondary oocyte and the first polar body.
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Human Physiology/Print Version Gastroparesis, or delayed stomach emptying, is a disorder in which, the stomach takes too long to empty its contents. Normally, muscles in the wall of the stomach work to grind food into smaller pieces and push its contents into the first part of the small intestine, the duodenum.
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apheresis Definition of apheresis. plural. aphereses. play \-ˌsēz\. : withdrawal of blood from a donor's body, removal of one or more blood components (such as plasma, platelets, or white blood cells), and transfusion of the remaining blood back into the donor —called also pheresis.
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A Glossary of Entomological Parthenogenesis. A form of reproduction in which eggs develop normally without being fertilised. This is the usual method of reproduction among some stick insect species and among some generations of gall wasps and aphids.
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Why do polar bodies form during oogenesis? Oogenesis is the name of the process by which female egg cells or oocytes develop to create an ovum, or egg cell. These cells go through a three step process; oogonium t … o a primary oocyte, secondary oocyte, and finally an ovum. The whole process occurs in the female ovaries. 4 people found this useful.
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- Called also hematogenesis, hemogenesis, and hemopoiesis. extramedullary hematopoiesis the formation and development of blood cells outside the bone marrow, as in the spleen, liver, and lymph nodes.etal hematopoiesis. in embryogenesis migration of stem cells from the yolk sac blood islands sets up hematopoiesis in thymus, lymph nodes, liver and spleen. When fetal bone develops a marrow cavity hematopoiesis is similarly established.
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Parthenogenesis Offspring are genetically identical to the parent, indicating it reproduces by apomixis, i.e. parthenogenesis in which the eggs did not undergo meiosis. Spinycheek crayfish (Orconectes limosus) can reproduce both sexually and by parthenogenesis.
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Myogenesis Myogenesis is the formation of muscular tissue, particularly during embryonic development. Muscle fibers generally form from the fusion of myoblasts into multi-nucleated fibers called myotubes.In the early development of an embryo, myoblasts can either proliferate, or differentiate into a myotube.yogenesis is the formation of muscular tissue, particularly during embryonic development. Muscle fibers generally form from the fusion of myoblasts into multi-nucleated fibers called myotubes.
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Paresis Not to be confused with Paruresis. Paresis is a condition typified by a weakness of voluntary movement, or partial loss of voluntary movement or by impaired movement.hen used without qualifiers, it usually refers to the limbs, but it can also be used to describe the muscles of the eyes (ophthalmoparesis), the stomach (gastroparesis), and also the vocal cords (Vocal cord paresis).
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Apomixis Apomixis is known in the form of parthenogenesis in worms, insects, fish, and reptiles. However, it is more widespread among plants. Apomixis, or asexual seed reproduction (agamospermy), is especially frequent among angiosperms.
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Asexual Reproduction in Plants Examples: 1  Aphids use parthenogenesis in the spring when they find themselves with ample food. In this species, reproduction by parthenogenesis is more rapid than sexual reproduction, and the use of this mode of asexual reproduction permits the animals to quickly exploit the available resources.
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What is Oogenesis? Ad. In the first stage of oogenesis, the oogonium undergoes oocytogenesis, creating the primary oocyte through mitosis. Like the oogonium, the primary oocyte is a diploid cell, containing two complete sets of chromosomes. Sex cells are haploid cells, containing only half the amount of chromosomes in a diploid cell.Haploid cells are formed from diploid cells by meiosis.Through ootidogenesis, a form of meiosis, the primary oocyte produces the haploid secondary oocyte. The process of ootidogenesis is halted halfway through, which is called dictyate, until ovulation, when it is completed to produce the released egg or ootid.d. In the first stage of oogenesis, the oogonium undergoes oocytogenesis, creating the primary oocyte through mitosis. Like the oogonium, the primary oocyte is a diploid cell, containing two complete sets of chromosomes. Sex cells are haploid cells, containing only half the amount of chromosomes in a diploid cell.
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- Introduction: Morphogenesis Description of Morphogenesis. Morphogenesis: The development of anatomical structures to create the form of a single- or multi-cell organism. Morphogenesis provides form changes of a part, parts, or the whole organism. Source: MeSH 2007. Morphogenesis: Related Topics
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apheresis Medical Definition of apheresis. plural. aphereses. \-ˌsēz\play. : withdrawal of blood from a donor's body, removal of one or more components (as plasma, blood platelets, or white blood cells) from the blood, and transfusion of the remaining blood back into the donor—called also pheresis; see leukapheresis, plasmapheresis, plateletpheresis.
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- Definition of Thermogenesis. Thermogenesis is defined as the body's way of creating heat. ... What people often refer to as metabolism is... Thermogenics are a popular class of dietary supplements commonly used in weight loss programs. By definition, a thermogenic increases metabolic rate by... Synephrine is a thermogenic fat burning agent, and Citrus Aurantium is a metabolic stimulant. ...
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Milk fever Milk fever, postparturient hypocalcemia, or parturient paresis is a disease, usually of dairy cows, characterized by reduced blood calcium levels (see: Hypocalcemia).
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What is oogenesis? Answer     Oogenesis or rarely oögenesis is the creation of an ovum (egg cell).     In mammals, oogenesis occurs in the ovarian follicle of the ovary. …Oogonial transformation into oocytes (oocytogenesis) is completed either before or shortly after birth.
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- What Is Parthenogenesis? Achondroplasia is a form of osteochondrodysplasia in which the bones (osteo-means bones) do not grow to the normal size from the cartilage (chondro-means cartilage) at the end of the limb bones.
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- Oogenesis is the production of an ovum or egg cell, the female gamete or sex cell. It is one type of gametogenesis, or sex cell production, the other being the male process of spermatogenesis.
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Parthenogenesis Now Possible in Humans 'virgin birth'. Even more successful were the parthenogenesis experiments -- in which five of eight human eggs were coaxed into growing into blastocysts. At this stage -- approximately 100 cells -- an embryo can be mined for its stem cells.
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Leukocyte extravasation Leukocyte extravasation, less commonly called diapedesis, is the movement of leukocytes out of the circulatory system and towards the site of tissue damage or infection. This process forms part of the innate immune response, involving the recruitment of non-specific leukocytes.
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What is Oogenesis? 10 most extreme places on Earth. Oogenesis is the production of an ovum or egg cell, the female gamete or sex cell. It is one type of gametogenesis, or sex cell production, the other being the male process of spermatogenesis.
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Orthogenesis Orthogenesis was a term first used by the biologist Wilhelm Haacke in 1893. Theodor Eimer was the first to give the word a definition; he defined orthogenesis as the general law according to which evolutionary development takes place in a noticeable direction, above all in specialized groups.. In 1922 the zoologist Michael F. Guyer wrote: