![]() Meiosis II is much more similar to a mitotic division. The daughter cells resulting from mitosis are diploid and identical to the parent cell. The four daughter cells resulting from meiosis are haploid and genetically distinct. There is no such reduction in ploidy level during mitosis.Ĭomparing Meiosis and Mitosis : Meiosis and mitosis are both preceded by one round of DNA replication however, meiosis includes two nuclear divisions. For this reason, meiosis I is referred to as a reduction division. When the tetrad is broken up and the homologous chromosomes move to opposite poles, the ploidy level is reduced from two to one. As a chiasmata develops, crossing over occurs between homologous chromosomes resulting in recombinant chromosomes. The main differences between mitosis and meiosis occur during meiosis I where the homologous chromosome pairs become associated with each other and are bound together with the synaptonemal complex. In contrast, t he nuclei resulting from meiosis is half the number of chromosome sets in the original cell, which is diploid. Furthermore, the two nuclei in mitosis have the same number of sets of chromosomes, one set in the case of haploid cells and two sets in the case of diploid cells. In meiosis, the two nuclear divisions result in four nuclei that are not genetically identical and contain one chromosome set only that usually divide into four new haploid daughter cells. Mitosis is a single nuclear division that results in two nuclei that are genetically identical to the original parent nucleus. The purpose of mitosis is cell regeneration, growth, and asexual reproduction, while the purpose of meiosis is the production of gametes for sexual reproduction. They share some similarities, but also exhibit distinct differences that lead to different outcomes. Mitosis and meiosis are both forms of division of the nucleus in eukaryotic cells. Animal and plant cells divide with the same process.ġ.Meiosis 1 has five phases: prophase 1, metaphase 1, anaphase 1, telophase 1 and interphase while meiosis 2 has varying stages depending on the organism.Ģ.Meiosis 1 recombines genes on the daughter cells produced while in meiosis 2 chromosomes are divided into these daughter cells.ģ.Both substages of meiosis occur from days to weeks.Mitosis and meiosis share some similarities but also some significant differences, chiefly that mitosis produces genetically identical diploid daughter cells where as meiosis produces genetically different haploid cells. It produces cells with half the number of chromosome so that during reproduction the produced cells will have the normal amount of chromosomes. Meiosis is generally the process in which sex cells whether male or female are formed. In plants and animals, meiosis 2 consists of four stages of cell division. In some organisms, telophase 1, interphase, and prophase 2 does not occur. Meiosis 1 has five phases including: prophase 1, metaphase 1, anaphase 1, telophase 1 and interphase. Meiosis 1 occurs by producing genetic recombination in the daughter cells while in meiosis 2 each of the four daughter cells will contain half the amount of chromosomes of the parent cell. Meiosis 1 and meiosis 2 are two separate substages of meiosis. However, in this case, chromosomes don’t replicate until fertilization occurs. In meiosis, a similar process also occurs when humans produce sex cells such as sperm and eggs. That is mitosis to give you a bird’s eye view. In this process, the genes which contain the information will then be divided and shared equally between the new daughter cells. Simple plants and animals undergo this type of process.įor complicated organisms such as humans, mitosis takes place. When it is time to replicate, cells divide equally. By using a microscope, cell division can be seen clearly. Cell division starts with mitosis as discussed in another article (Difference between Mitosis and Meiosis 2).Ĭell division can be clearly seen in microscopic organisms such as an amoeba. Without it we will not exist simply because we all came from a single cell. Cell division is a vital process in reproduction. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |