Term
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Definition
| the process by which a cell reproduces itself.. |
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Term
| cell division is important for? |
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Definition
1.normal growth and development
2. Cell replacment
3. repair of an organism
and also to heal wounds |
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Term
| Do cells simply split in half to form two new cells? |
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Definition
| no, if it did, each cell will be smaller than the other each cell would lose half of its contents. |
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Term
| In order to make new cells each cell has to pass through a serious of stages called? |
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Definition
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Term
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Definition
| an ordered sequence of stages in which a cell progresses in order to divide during its life. |
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Term
| What is the purpose of cell cycle? |
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Definition
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Term
| Another purpose of the cell cycle? |
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Definition
| one parent cell divides into two new identical daughter cells, each of which is also identical to the parent cell. |
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Term
| cell cycle consists of preparatory phases known as? |
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Definition
1.Interphase
2. divison phase -mitosis, cytokinesis |
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Term
| Name the three stages of interphase? |
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Definition
1. g1=growth stage
2. S=sythesis stage
3. G2= |
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Term
| During what phase does a cell spend most of thier time? |
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Definition
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Term
| before a cell divides what happens? |
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Definition
| it makes a copy of its contents so that each new cell has the same amount of organells, DNA, cytoplasm as the orginal cell. |
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Term
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Definition
| (growth phase) the cell grows and prepares to divide both its DNA and its organells. |
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Term
| What happens during S stage? |
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Definition
| (synthesis phase) DNA replication occurs, each chromosome is replicated to produce two identical sister chromatides and attaches to one another at the centromere. |
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Term
| define a sister chromatide |
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Definition
| two identical DNA molecules that make up a duplicated chromosome |
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Term
| sister chromatides are joined togeather by? |
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Definition
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Term
| What happens during G2 phase? |
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Definition
| final preparatory stage, cell prepares to divide by making protiens needed for cell division. |
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Term
| dupliated chromosomes are composed of two identical halfs called? |
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Definition
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Term
| once the cell duplicates its contents, it enters what phase of the cell cycle? |
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Definition
| division phase= Mitosis and Cytokinesis |
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Term
| what happens during Mitosis? |
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Definition
| separation of duplicated chromosomes during ecll division (division of the nucleous) |
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Term
| what happens during cytokinesis? |
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Definition
physical division of a cell into two daughter cells.
(division of the cytoplasm) |
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Term
| overview during mitosis and cytokinesis? |
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Definition
| sister chromatides pull apart and move into separate daughter cells. |
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