Question

understanding checkpoint mitosis 1. mitosis has __ stages (phases). 2. the correct order of the phases of mitosis is: a. prophase, metaphase, anaphase, telophase b. metaphase, anaphase, prophase, telophase c. interphase, telophase, anaphase, prophase d. telophase, anaphase, metaphase, prophase 3. when does dna copy itself? a. interphase b. prophase b. anaphase d. telophase 4. the process of cell division allows a. replacement of injured cells. b. organisms to grow. c. old cells to be replaced. d. all of the above 5. examine the above picture, what phase is this cell in? a. prophase b. anaphase c. metaphase d. telophase 6. a cell with 12 chromosomes undergoes mitosis, how many daughter cells are formed? a. 2 b. 6 c. 12 d. 24 7. if a cell that has 8 chromosomes goes through mitosis, how many chromosomes does each daughter cell have? a. 4 b. 8 c. 12 d. 16 8. which is not a phase of mitosis? a. interphase b. prophase c. metaphase d. anaphase 9. cells spend most of their time in this growing phase: a. interphase b. prophase c. anaphase d. telophase 10. t or f: cells spend 10% of their time in mitosis. name mya date __ period ____

Explanation:

1. Mitosis consists of 4 distinct active stages.
2. The standard sequential order of mitosis phases is prophase, metaphase, anaphase, telophase.
3. DNA replication occurs during the interphase stage of the cell cycle, before mitosis begins.
4. Cell division via mitosis enables growth, replacement of injured/old cells, so all options apply.
5. The image shows sister chromatids being pulled apart to opposite poles, which is characteristic of anaphase.
6. Mitosis always produces 2 genetically identical daughter cells regardless of the parent cell's chromosome count.
7. Daughter cells from mitosis have the same chromosome number as the parent cell to maintain genetic consistency.
8. Interphase is the growth and preparation phase before mitosis, not a phase of mitosis itself.
9. Cells spend the vast majority of their cell cycle in interphase, performing normal functions and preparing for division.
10. Cells typically spend only about 10% of their cell cycle in mitosis, with the rest in interphase, so this statement is true.

Answer:

1. 4
2. a. prophase, metaphase, anaphase, telophase
3. a. Interphase
4. d. All of the above
5. b. anaphase
6. a. 2
7. b. 8
8. a. Interphase
9. a. Interphase
10. T (True)