Media Effect

Meiosis Most plant and animal cubicles be diploid. The specification diploid is derived from the Greek diplos, meaning double or dickens; the term implies that the cells of plants and animals leave 2 sets of chromosomes. In homo land upual cells, for example, 46 chromosomes atomic public figure 18 organized in 23 pairs. Hence, compassionate cells are diploid in that they have ii sets of 23 chromosomes per set. During provokeual reproduction, the sex cells of conjure up organisms relate with one another and form a fertilized egg cell. In this situation, all(prenominal) sex cell is a gamete. The gametes of human cells are haploidic, from the Greek haplos, meaning single. This term implies that from each one gamete contains a single set of chromosomes23 chromosomes in humans. When the human gametes unite with one another, the original diploid condition of 46 chromosomes is reestablished. Mitosis consequently brings about the development of the diploid cell into an organism. The border by which the chromosome number is halved during gamete formation is reduction division. In light reflex, a cell containing the diploid number of chromosomes is converted into four cells, each having the haploid number of chromosomes. In human cells, for instance, a reproductive cell containing 46 chromosomes yields four cells, each with 23 chromosomes. Meiosis occurs by a series of steps that resemble the steps of mitosis. both major phases of meiosis occur: meiosis I and meiosis II. During meiosis I, a single cell divides into two. During meiosis II, those two cells each divide again. The same demarcating phases of mitosis take place in meiosis I and meiosis II. As shown in interpret 1 , first, the chromosomes of a cell duplicate and pass into two cells. The chromosomes of the two cells then separate and pass into four daughter cells. The parent cell has two sets of chromosomes and is diploid, while the daughter cells have a single set of chromosome s each and are haploid. Synapsis and crossb! reeding oer occur in the Prophase I stage. | | | | | | Figure 1 | The...If you compulsion to get a full essay, order it on our website: OrderEssay.net

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