click below
click below
Normal Size Small Size show me how
Mitosis
Part C
| Question | Answer |
|---|---|
| What happens during interphase? | 1. 1st Growth Phase: Cell grows and develops its organelles. 2. Synthesis: The chromosomes replicate (double) in the nucleus. |
| What happens during prophase? | Centrioles move to opposite poled and chromosomes coil up. |
| What happens during metaphase? | Spindle fibers attach to centromere and line chromosomes in the middle. |
| What happens during anaphase? | Spindle fibers retract and pull half of the chromosones towards each centriole. |
| What happens during telophase? | Spindle fibers are back in the centrioles, nuclear envelopes start to form around both sets of chromosomes which become chromatin. |
| What is mitosis? | When the nucleus divides. |
| What are the cell checkpoints? | The DNA strands must not be replicated or damaged. If there is a lack of nutrients or if the spindle fibers do not move to opposite poles during anaphase, the cell is destroyed. |
| When does cytokinesis occur and what is it? | It occurs when the cell divides. The cell membrane pinches of in the middle and forms |
| What is apoptosis? | Cells die when it is too old to function because of the lysosomes. |
| What are cancer cells? | Cells that can undergo mitosis an unlimited number of times and do not die on their own. |
| What are tumors? | Cells that clump together due to an uncontrollable urge to divide. |