Mitosis

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What is mitosis?
Where a cell divides and creates 2 genetically identical daughter cells
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Why is mitosis necessary?
Because it creates genetically identical copies of itself, it means that the cells can be produced to repair damaged tissues, growth and replacement of old cells.
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What is a chromosome?
Condensed and coiled DNA in the form of chromatin ( a DNA molecule)
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What is chromatin?
Uncondensed DNA with lots of histones (protein), is formed during interphase when DNA combines with histones
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What are chromatids?
Chromosome is converted into 2 identical DNA molecules which are the chromatids
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Describe prophase
Chromatin fibers condense and coil, chromosomes become visible, Nucleolous disappears and nuclear membrane breaks down, microtubules for spindle shaped structures
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Describe Metaphase
Chromosomes move to the equator of cell and attach to spindle fibers
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Describe anaphase
Centromeres in the chromosome holding together the chromatids divide and the chromatids are separated and pulled to opposite poles (spindle fibers)
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Describe telophase
Chromatids reach the poles and are now chromosomes again, nuclear envolope reforms around them and they uncoil, nucleolous is formed
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Describe cytokinesis in animal cells
The cell forms a cleavage furrow in the middle, the cytoskeleton pulls the membrane inwards until it is close enough to fuse around the middle forming 2 cells
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Describe cytokinesis in plant cells
Vesicles from the golgi apparatus line up in the middle and fuse with each other and the cell surface membrane forming a membrane in the middle and splitting the cell into 2, cell wall is then formed
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Card 2

Front

Why is mitosis necessary?

Back

Because it creates genetically identical copies of itself, it means that the cells can be produced to repair damaged tissues, growth and replacement of old cells.

Card 3

Front

What is a chromosome?

Back

Preview of the front of card 3

Card 4

Front

What is chromatin?

Back

Preview of the front of card 4

Card 5

Front

What are chromatids?

Back

Preview of the front of card 5
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