Why do organisms need to produce genetically identical daughter cells?
For growth, repair and replacement.
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What does mitosis refer to?
The process of nuclear division where 2 genetically identical nuclei are formed from one parent cell nucleus.
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What are the 4 stages in mitosis?
Prophase, metaphase, anaphase, telophase.
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Describe what happens in prophase
Chromosomes shorten+thicken and consist of a pair of sister chromatids. The nuclear envelope breaks down + disappears. Centriole divides in 2 and each moves to opposite poles to form the spindle.
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What happens in metaphase?
Chromosomes move to central region (equator) of the spindle and each becomes attached to a spindle by its centromere.
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Describe what happens in anaphase
The replicated sister chromatids are separated from each other when the centromere splits.Spindle fibres shorten, pulling sister chromatids further away from each other towards the poles.
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What happens in telophase?
As sister chromatids reach poles of the cell, a new nuclear envelope forms around each set. Spindle breaks down and disappears. Chromosomes uncoil and can no longer be seen under a light microscope.
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Describe what happens in cytokinesis
The whole cell splits to form 2 new cells, each containing a full set of chromosomes identical to the original parent cell.
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What parts of plants can divide this way?
Meristem cells.
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Other cards in this set
Card 2
Front
What does mitosis refer to?
Back
The process of nuclear division where 2 genetically identical nuclei are formed from one parent cell nucleus.
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