5050454
Description
Flashcards by francesca graham, updated more than 1 year ago
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Created by francesca graham
over 8 years ago
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| Question | Answer |
| Why are new cells made in mitosis? | For growth and repair |
| How many copies of each chromosome does each body cell normally have? | 2 |
| How many pairs of chromosomes does a human cell have? | 23 |
| When a body cell divides through mitosis, the new cell is _________ to the original | Identical |
| How are the DNA in a cell that isn't dividing? | Spread out in long strings |
| What happens to the DNA in a cell when it gets the signal do divide? | The DNA duplicates itself and forms X-shaped chromosomes |
| What happens to the chromosomes when it duplicates itself? | They line up in the center of the cell and cell fibres pull the two arms of each chromosome apart to opposite sides of the cell |
| What happens after the duplicated chromosomes are pulled apart? | Membranes form around each set of chromosomes to form 2 new nuclei |
| What is the last stage of mitosis | The cytoplasm divides |
| What form of reproduction uses mitosis? | Asexual |
| What doesn't occur in asexual reproduction? | variation |
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