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CELL CYCLE, MITOSIS
| Question | Answer |
|---|---|
| What is the cell cycle | The sequence of growth, DNA replication, and division that a cell goes through. |
| What are the two main parts of the cell cycle | Interphase and M phase (mitosis + cytokinesis). |
| What happens during interphase | The cell grows, DNA is replicated, and the cell prepares for division. |
| What are the three phases of interphase | G1, S, and G2. |
| What happens during G1 | Cell growth and normal functions. |
| What happens during S phase | DNA replication. |
| What happens during G2 | Cell prepares for mitosis by making organelles and proteins. |
| What are cell cycle checkpoints | Control points (G1, G2, M) that regulate cell growth and division. |
| What is mitosis | Division of the nucleus into two genetically identical daughter nuclei. |
| What is cytokinesis | Division of the cytoplasm into two daughter cells. |
| List the four phases of mitosis in order. | Prophase, Metaphase, Anaphase, Telophase. |
| What happens in prophase | Chromosomes condense, spindle fibers form, and nuclear envelope breaks down. |
| What happens in metaphase | Chromosomes line up at the equator of the cell. |
| What happens in anaphase | Sister chromatids are pulled apart to opposite poles. |
| What happens in telophase | Nuclear membranes reform and chromosomes uncoil. |
| How is cytokinesis different in plant and animal cells | Animal cells form a cleavage furrow; plant cells form a cell plate. |
| Why is mitosis important | It allows for growth, repair, and asexual reproduction. |
| What is asexual reproduction | Process where a single parent produces identical offspring. |
| What is sexual reproduction | Process where two parents produce genetically unique offspring. |
| What is an advantage of asexual reproduction | It is fast and produces many offspring. |
| What is a disadvantage of asexual reproduction | No genetic variation. |
| What is an advantage of sexual reproduction | Genetic variation that increases survival in changing environments. |
| What is a disadvantage of sexual reproduction | It is slower and requires two parents. |