Parthenogenesis Essay Example | Topics and Well Written Essays - 2750 words

Par and soogenesis - Essay ExampleWhat is parthenogenesis Why is it a form of asexual, rather than a sexual type of breeding What argon the organisms that affirm the ability to undergo parthenogenesis How can the intimacy of this type of reproduction benefit genetics, biology and science as a whole These atomic number 18 respectable some of the questions we will try to answer in this paper dedicated to delve deeper into the bear on of parthenogenesis.The intimately commonly known type of reproduction is the sexual reproduction. Two parents, unitary male and one female, are needed to produce an topic. The Oxford Dictionary of Biology (2004) expounds that sexual reproduction is a form of reproduction that involves the uniting of two reproductive cells (gametes) in the process of fertilization. In general, the gametes consist of a sperm from one individual and an egg from another. In a process called fertilization, the gametes unite to form a cell called the zygote, which deve lops into the offspring. The wise individual is genetically different from its parents. Gametes are produced through a type of cell division called meiosis. In a cell produced by this kind of division, on that point are only half as umpteen chromosomes as were in the cell that produced it.Sexual reproduction occurs normally, especially in animals. ... Gametes are formed by meiosis, a special kind of cell division in the parent reproductive organs that two reassorts the genetic material and halves the chromosome number. Meiosis thus ensures genetic variability in the gametes and therefore in the offspring resulting from their subsequent fusion. Sexual reproduction, unlike asexual reproduction, therefore generates variability within a species. However, it dep annihilates on there being reliable means of bringing together male and female gametes, and many elaborate mechanisms have evolved to ensure this (Oxford Dictionary of Biology, 2004). On the other hand, asexual reproduction i s a form of organic reproduction in which the parent organism does not exchange genetic material with another organism of the equivalent species (Ashworth and Little, 2001). In fact, there are four general types of asexual reproduction 1.) Binary fission - normally occurring in protists and other unicellular organisms, binary fission closely resembles the process of mitosis, by which the cells of multicellular animals divide. The organisms chromosomes take over (duplicate themselves) within the cell nucleus the nucleus elongates with a group of identical chromosomes in each end and finally the cell splits down the middle, along the short axis of the elongated nucleus, forming two daughter cells, which are exact copies of the parent cell. 2.) Fragmentation - This occurs when an organisms body or body part breaks into two or to a greater extent pieces each part then develops into a completely new organism. The regrowth of tissue is referred to as regeneration. 3.) Budding - This pro cess produces a small copy of the parent that begins as a growth on the parents side and then breaks