Meiosisis a type of cell division that to reduce the number of chromosomes in the parentcell by half and produces 4 gamete cells. This process is forced toproduce egg and sperm cells for sexual reproduction. Throughout reproduction, if sperm and also egg hold together to form a single cell, the number of chromosomes isrestored in the offspring.

Meiosisbegins with a parent cell the is diploid, meaning it has two duplicates of eachchromosome. The parental cell experience one ring of DNA replication followed bytwo different cycles of atom division. The procedure results in 4 daughtercells that room haploid, which means they contain fifty percent the variety of chromosomesof the diploid parent cell.

Meiosishas both similarity to and also differences indigenous mitosis, i m sorry is a cell divisionprocess in which a parental cell to produce two similar daughter cells. Meiosisbegins adhering to one ring of DNA replication in cells in the masculine or femalesex organs. The procedure is split into meiosis I and also meiosis II, and also bothmeiotic divisions have multiple phases. Meiosis i is a form of cabinet divisionunique to germ cells, when meiosis II is similar to mitosis.

MeiosisI, the very first meiotic division, begins with prophase I. During prophase I, thecomplex of DNA and also protein known as dyed condenses to form chromosomes.The bag of replicated chromosomes are well-known as sister chromatids, and theyremain joined at a central point called the centromere. A large structurecalled the meiotic spindle additionally forms from lengthy proteins dubbed microtubules oneach side, or pole, of the cell. In between prophase I and also metaphase I, the pairsof homologous chromosome form tetrads. Within the tetrad, any type of pair the chromatidarms have the right to overlap and also fuse in a process called crossing-over or recombination.Recombination is a procedure that breaks, recombines and also rejoins sections of DNAto produce new combinations the genes. In metaphase I, the homologous bag ofchromosomes align on either next of the equatorial plate. Then, in anaphase I,the spindle yarn contract and also pull the homologous pairs, each with twochromatids, far from each other and also toward each pole of the cell. Duringtelophase I, the chromosomes are enclosed in nuclei. The cell now undergoes aprocess dubbed cytokinesis the divides the cytoplasm the the original cell intotwo daughter cells. Each daughter cell is haploid and has just one collection ofchromosomes, or half the total number of chromosomes the the original cell.

MeiosisII is a mitotic department of every of the haploid cells produced in meiosis I.During prophase II, the chromosomes condense, and also a new set that spindle fibersforms. The chromosomes start moving towards the equator that the cell. Duringmetaphase II, the centromeres of the combine chromatids align follow me theequatorial bowl in both cells. Climate in anaphase II, the chromosomes separateat the centromeres. The spindle fibers pull the be separate chromosomes towardeach pole of the cell. Finally, during telophase II, the chromosomes areenclosed in nuclear membranes.


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Cytokinesis follows, separating the cytoplasm ofthe two cells. In ~ the conclusion that meiosis, there are four haploid daughtercells that go ~ above to build into either sperm or egg cells.