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Mitosis is a process in which the chromosomes are replicated so that each cell contains the identical number of chromosomes as its parent cells. On the other hand, meiosis is a type of cell division that reduces the chromosome number by half. The two processes are both important but serve different purposes. One way to remember this difference between mitosis and meiosis is to think about mitosis as a "copy" since it replicates the original set of chromosomes present in each parental cell to produce daughter cells with identical sets. On the other hand, Meiosis can be thought of as a "mix" due to its purpose being to mix together genetic material from parents to produce offspring with combinations of traits not present in either parent.
The process of mitosis is found in all living organisms. Mitosis creates daughter cells that are genetically identical to each other and to the parent cell. Meiosis occurs during sexual reproduction and produces haploid gametes (sperm or egg cells). These specialized cells contain only half the number of chromosomes as a regular body cell, so when two gametes merge at fertilization, they produce a complete diploid set of chromosomes. Let's find out an overview of mitosis vs meiosis. overview of mitosis vs meiosis.
Both mitosis and meiosis are types of cell division, resulting in the formation of daughter cells that are genetically identical to each other and their parent cell. The difference between them is that mitosis takes place during the growth stage while meiosis occurs at different stages depending on the type of germline cells involved, i.e., spermatogonia, oogonial stem cells or primary oocytes, due to the fact that they have already replicated their DNA prior to the formation of gametes (sperm or egg). Mitosis and meiosis involve two steps for completion, which are known as karyokinesis and cytokinesis, respectively, where daughter chromosomes/cells remain together until a complete set is formed. During cytokinesis, the mitotic spindle disintegrates into fragments that are removed after splitting interconnected cells. On the other hand, the meiotic spindle doesn't split completely but remains connected by a cytoplasmic bridge until all chromosomes/cells reach their respective poles.
During mitosis and meiosis I division phase, sister chromatids separate to form two equal diploid daughter cells, while during the meiosis II phase, homologous chromosomes separate, resulting in four haploid gametes with half the number of chromosomes found in parental cells. However, both mitosis and meiosis result in the formation of genetically identical daughter cells, which play an important role in the growth, reproduction or development of offspring where fertilization takes place between male and female germ cells for this purpose.
The meiosis II phase is preceded by meiotic interphase, where DNA replication takes place prior to the formation of sister chromatids in prophase I. Mitosis doesn't involve any type of interphase stage, whereas both mitotic and meiotic divisions take place only once during every cell cycle due to the fact that they are non-dividing stages, unlike G2 or S phase involved in cell growth and DNA replication, respectively.
Both mitosis and meiosis start with metaphase followed by anaphase, prometaphase, metaphase, telophase and cytokinesis, where chromosome movement during division phases differs in these two types of cell divisions, i.e., centromere movement during mitosis leads to the formation of two identical daughter cells, whereas sister chromatids move towards opposite poles during meiosis I or II resulting in the production of four haploid gametes.
Mitosis occurs at a later stage of development when growth is completed. Cells are required to produce two genetically identical daughter cells which will replace themselves. At the same time, meiosis takes place early in development where germline cells are produced for fertilization purposes after replication of DNA prior to division, i.e., spermatogonia undergo mitotic division at successive stages leading to oogenesis, production of female germline cells called oocytes where meiosis begins with prophase followed by metaphase, anaphase, telophase, cytokinesis resulting in the formation of four haploid ova containing half number of chromosome found in parental cells, i.e., 23 homologous chromosome pairs found in the human body.
Both mitosis vs meiosis are two types of cell divisions that occur in somatic (body) cells after the formation of four daughter cells, whereas germline cells divide by meiosis at successive stages leading to the production of haploid gametes, each containing only one set of homologous chromosome pairs. Therefore, mitosis is a non-dividing stage where only two daughter cells are produced, while meiosis takes place at different stages due to the fact that it produces four haploid gametes. Also, centromere movement during mitosis leads to the formation of two identical daughter cells, whereas sister chromatids move towards opposite poles during meiosis I or II resulting in the production of four haploid gametes with half the number of chromosomes found in parental cells.
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Keith Morris is a certified nurse who retired as a registered nurse after participating in a WHO campaign in Geneva. He is dedicated to helping students score good grades in their nursing courses and are offered a chance to help the people and establish a better healthcare community across the globe. He works as a nurse at a local clinic with underprivileged children and provides assignment guidance to the students. Reflection writing, aged care, Gibbs reflective cycle, cardiac nursing, pathophysiology, etc. are a few to name from his area of dominance.
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