Discussion of all aspects of cellular structure, physiology and communication.
4 posts • Page 1 of 1
This is some information about mitosis and meiosis , I hope it help !!
If you need more I think you will find it in the net ….
Mitosis is the process of nuclear division in eukaryotes. It is one part of the cell cycle and it result in the production of daughter nuclei that contain identical chromosome number and that are genetically identical to one another and to the parent nucleus from they arose. Mitosis is usually followed by cytokinesis. Both haploid and diploid cells proliferate by mitosis.
Meiosis is occurs in all sexually reproducing eukaryotes. It the process by which a specialized diploid (2N)cell or cell nucleus with two sets of chromosomes is transformed , through one round of chromosome replication and two rounds of nuclear division, into four haploid (N) cell or nuclei, each with one set of chromosomes. In the first of two division, pairing, crossing –over, and synapsis of homologous chromosome occur. The meiotic process, in combination with fertilization, results in the conservation of the number of chromosomes from generation to generation. It also generate genetic variability through the various ways in which maternal and paternal chromosomes are combined in the progeny nuclei and by crossing-over (the reciprocal physical exchange of chromosome segments at corresponding positions along pair of homologous chromosomes.
you can see:
http://www.emc.maricopa.edu/faculty/far ... iosis.html
http://www.bio.unc.edu/faculty/salmon/l ... tosis.html
Meosis, during cell division the nucleus of a cell completes two divisions producing four gametes (gametes are sex cells either sperm or egg) , each gamete with a chromosome reduced by half.
Mitosis-cell division-the nucleus of a cell divides into two nuclei, with the same number and kind of choromosomes, which then results in reproduction of new cells for growth and repair.
If you're looking for differences, and not just the general definition, then these ideas may help:
I tend to think of mitosis as, "what goes in must come out the exact same way (baring mutations)." Except here you get two of what you started with. Also of note, although not relevant to your question, is the distinction between mitosis and binary fission: mitosis is the term we use for cellular division in eukaryotes, and binary fission is the term we use for cellular division in prokaryotes.
I tend to think of meiosis as, "what goes in will not come out." Meiosis is different from mitosis in that two unidentical cells (called gametes), one from the mother and one from the father, join together (forming what we call a zygote), and then a new cell forms that, after undergoing several rounds of mitosis, is the "baby." In more scientific terms, meiosis refers to the process where two haploid gametes unite to form a zygote. Also of note, although not relevant to your question, is the distinction between meiosis and genetic recombination: meiosis is a term reserved for eukaryotes, and genetic combination is used for prokaryotes. Specifically, there are three types of genetic recombination: conjugation, transformation, and transduction.
4 posts • Page 1 of 1
Who is online
Users browsing this forum: No registered users and 0 guests