The cell cycle Flashcards
what are the first three stages of the cell cycle
interphase
mitosis
cytokinesis
what two stages are included in interphase
the g1 phase
the s phase
and the G2 phase
what happens in the g1 stage
the cell grows
new organells and protiens are made
what happens in the s phase
dna replicated semi conseritively.(two strands of DNA unwind from each other, and act as a template for synthesis of a new, complementary strand)
so 2 chromatids (identicle copies) join at the centromere
what happens in the G2 stage
the cell grows and protiens are made
what happens in mitosis
the nucleus divides
2 genetically identical daughter cells are formed
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what stages are invloved in mitosis
interphase
prophase
metaphase
anaphase
telophase
why type of cells divide by mitosis
eukaryotic cells
what do the chromosomes do? what happens to the nuclear envelope? opposi
what happens during prophase
chromasomes condence
nuclear envelope breaks down
the centrioles goes to opposite poles- this forms a spindle network
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spindle fibres do what? What do the chromosomes do?
what happens during metaphase
the spindle fibres attach to chromosmes by centromeres
the chromosomes alighn along the equator
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what happens to the spindles?
the centromere _____
where do the chromati
what happens during anaphase
the spindles contract
the centromere divides
the chromatides are pulled to their opposite poles of the cell
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the chromosomes
what happens to the nuclear envelope
the spindles
what happens during telophase
the chromosomes uncoil and become longer
the neuclear envelope refoms
the spindles break down
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what is formed
what happens in cytokinesis
the cytoplasm and cell membranes are divided so 2 genetically identical daughter cells are formed
