User: When would an organism need to undergo the process of mitosis and meiosis.

Weegy: An organism would need to undergo mitosis for: -Growth -Development -Repair -Asexual reproduction Keep in mind that when prokaryotes such as bacterium reproduce, it is not through the process of mitosis. [ It is through binary fission, a type of asexual reproduction that produces identical offspring. Only eukaryotes go through the specific process of mitosis. ]
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User: When would an organism need to undergo the process of meiosis.

Note: An organism would need to undergo mitosis for: -Growth -Development -Repair -Asexual reproduction Keep in mind that when prokaryotes such as bacterium reproduce, it is not through the process of mitosis. [ It is through binary fission, a type of asexual reproduction that produces identical offspring. Only eukaryotes go through the specific process of mitosis. ]
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Weegy: Prior to the meiosis process the cell's chromosomes are duplicated by a round of DNA replication, creating from the maternal and paternal versions of each chromosome (homologs) two exact copies, sister chromatids, attached at the centromere region. [ In the beginning of meiosis the maternal and paternal homologs pair to each other. Then they typically exchange parts by homologous recombination leading to crossovers of DNA between the maternal and paternal versions of the chromosome. Spindle fibers bind to the centromeres of each pair of homologs and arrange the pairs at the spindle equator. Then the fibers pull the recombined homologs to opposite poles of the cell. As the chromosomes move away from the center the cell divides into two daughter cells, each containing a haploid number of chromosomes composed of two chromatids. http://en.wikipedia.org/wiki/Meiosis ]
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