The Cell Cycle - 7th Grade Questions and Answers Rated A

The Cell Cycle - 7th Grade Questions and Answers Rated A What is the cell cycle? The sequence of growth and division in a cell. In the cell cycle, who divides? One parent cell forms two daughter cells with the same DNA. What is DNA? Genetic material. What are the the stages of the cell cycle? 1. Interphase 2. Mitosis 3. Cytokinesis What stage is the cell "IN" most of the time? Interphase What happens in Stage 1 of the cell cycle? Interphase: **Most of the time the cell is "IN" this stage. 1. Cell grows to mature size. 2. DNA replication - makes a copy of DNA directions. 3. Prepares to divide. What happens in Stage 2 of the cell cycle? Mitosis: 1. Cell's nucleus divides. 2. One copy of the DNA is provided to each of the daughters cells **It takes four phases to complete mitosis** What are the four phases of Mitosis? 1. Prophase 2. Metaphase 3. Anaphase 4. Telophase What happens in Prophase and which phase of mitosis is it? Phase 1 of mitosis. 1. Chromatin coils to form chromosomes (x-shape) 2. Nuclear membrane disappears. What happens in Metaphase and which phase of mitosis is it? Phase 2 of mitosis. **Think middle phase** 1. Chromosomes line up in the middle of a cell What happens in Anaphase and which phase of mitosis is it? Phase 3 of mitosis. 1. Chromosomes are pulled apart at the centromere. 2. Fibers pull chromotids away towards opposite poles. What happens in Telophase and which phase of mitosis is it? Phase 4 of mitosis. 1. Chromosomes uncoil. 2. Nuclear membranes form around each set of chromosomes. What happens stage 3 of the cell cycle? Cytokinesis: 1. Cytoplasm divides between the 2 daughter cells. 2. Animal = cell membrane pinches together around the middle. 3. Plant = a cell plate (cell wall) forms in middle between each new cell. What are the results of the cell cycle? After the cell has finished dividing, the parent cell no longer exists but two new identical copies of that cell do. Name the phase/stage: Cell grows to mature size. Interphase Name the phase/stage: DNA replication: makes a copy of DNA directions Interphase Name the phase/stage: Prepares to divide Interphase Name the phase/stage: Cell's nuclues divides Mitosis Name the phase/stage: One copy of DNA is provided to each of the daughter cells Mitosis Name the phase/stage: Chromatin coils to form chromosomes (x-shape) Prophase Name the phase/stage: Nuclear membrane disappears Prophase Name the phase/stage: Chromosomes line up in the middle. Metaphase Name the phase/stage: Chromosomes are pulled apart at the centromere Anaphase Name the phase/stage: Fibers pull chromatids away towards opposite poles. Anaphase Name the phase/stage: Chromosomes uncoil Telophase Name the phase/stage: Nuclear membranes form around each set of chromosomes Telophase Name the phase/stage: Cytoplasm divides between the 2 daughter cells Cytokinesis Name the phase/stage: Cytokinesis Name the phase/stage: Cytokinesis