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Stack #81276

Mitosis

QuestionAnswer
Mitosis Is an asexual reproduction which divides the nucleus of a cell to form 2 cells with 2 genetically identical nuclei(=somatic cells!) Results in the formation of 2 identical diploid cells from one diploid cell. It involves only only one cellular division!
Cellular reproduction a process by which cells duplicate their contents and then divide to yield 2 cells with similar contents.
Functions/uses of mitosis (growth of the organism, repair of damaged tissues, asexual reproduction) = in eukaryotes
Phases/stages There are 4 stages: Prophase, Metaphase, Anaphase, Telophase
Cytokinesis the process of dividing the cytoplasm to form 2 cells. Occurs during the TELOphase!
(Early) Prohase The spindle microtubules are growing/formed at opposite poles of the cell (and the chromosomes are becoming shorter and fatter by supercoiling)
(Late) Prophase The spindle microtubules extend from each pole to the equator(and each chromosome consists of 2 identical chromatids)
Chromatid formed by DNA replication in interphase and are held together by a centromere. Two sister chromatids make one chromosome!
Metaphase The nuclaer envelope has broken down an d the chromosomes have aligned in the equator. The spindle microtubules attaches to each centromere.
Anaphase The spindle microtubules pull the genetically identical chromosomes to opposite poles.(The centromeres has divided and the chromatids have become chromosomes!)
(Early) Telophase All the chromosomes reaches the poles and nuclear membranes form around them. The spindle microtubules break down.
(Late telophase) The cell divides(cytokinesis) and forms 2 cells with genetically identical nuclei and the chromosomes uncoil and are no longer individually visible.
Created by: eysa
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