when do organisms use mitosisWeegy:
Mitosis is the process by which a eukaryotic cell separates the chromosomes in its cell nucleus into two identical sets in two nuclei. [ It is generally followed immediately by cytokinesis, which divides the nuclei, cytoplasm, organelles and cell membrane into two cells containing roughly equal shares of these cellular components. Mitosis and cytokinesis together define the mitotic (M) phase of the cell cycle?the division of the mother cell into two daughter cells, genetically identical to each other and to their parent cell. This accounts for approximately 10% of the cell cycle.
Mitosis occurs only in eukaryotic cells and the process varies in different species. For example, animals undergo an "open" mitosis, where the nuclear envelope breaks down before the chromosomes separate, while fungi such as Aspergillus nidulans and Saccharomyces cerevisiae (yeast) undergo a "closed" mitosis, where chromosomes divide within an intact cell nucleus. Prokaryotic cells, which lack a nucleus, divide by a process called binary fission. ] Auto answered|Score .7127|shifa saleheen|Points 9966|User:
when do organisms use meiosisWeegy:
when is meiosis process used?
Meiosis in Animals
Used to produced the gametes: sperm and eggs
Meiosis in Plants
Used to produce spores. [ Spores are the start of the gametophyte generation which, in time, will produce gametes (by mitosis because the starting cells are already haploid).
Here is a brief overview of the process. A more detailed view is provided below.
When the chromosomes first become visible they are already doubled, each homologue having been duplicated during the preceding S phase.
Result: pairs of homologous dyads each dyad consisting of two sister chromatids held together by a protein complex called cohesin.
Pairing: Each pair of homologous dyads align lengthwise with each other.
Result: a tetrad. (These structures are sometimes referred to as bivalents because at this stage you cannot distinguish the individual sister chromatids under the microscope.)
The two homologous dyads are held together by
one or more chiasmata (sing. = chiasma) which form between two nonsister chromatids at points where they have crossed over.
the synaptonemal complex (SC), a complex assembly of proteins (including cohesin)
] Auto answered|Score .8883|mpaul123|Points 170|User:
in which process does the important difference occurNote:
The healing process usually does not occur without repercussions. [ During the initial phase of healing, www.healthtotem.com/en/articles/healing_crisis.html
] Auto answered|Score .7938Note:
I'm sorry that that wasn't a good answer. Please hold on while I contact an expert.Weegy:
ell division and reproduction can occur in two ways - mitosis and meiosis. Mitosis is a process of cell duplication, or reproductionExpert answered|owen888|Points 10|
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