Which of the following lists mitosis phases in the appropriate sequence prophase, metaphase, anaphase, telophase
anaphase, prophase, metaphase, telophase
interphase, prophase, metaphase, telophase
prophase, metaphase, anaphase, telophase, G1 phase
The appropriate sequence of mitosis phases is prophase, metaphase, anaphase, telophase. To determine the correct answer, we need to understand what occurs during each phase of mitosis.
1. Prophase: This is the first phase of mitosis, during which the condensed chromosomes become visible and the nuclear envelope starts to break down. The spindle fibers also begin to form.
2. Metaphase: In this phase, the chromosomes align at the center of the cell along the metaphase plate. The spindle fibers are attached to the centromeres of the chromosomes.
3. Anaphase: During anaphase, the sister chromatids separate and move towards opposite poles of the cell. This separation is facilitated by the shortening of the spindle fibers.
4. Telophase: Telophase is the final phase of mitosis, where the nuclear envelope reforms around the separated chromosomes, forming two nuclei. The chromosomes begin to decondense.
Now, let's analyze the given options:
- Option 1: prophase, metaphase, anaphase, telophase - This is the correct sequence of mitosis phases.
- Option 2: anaphase, prophase, metaphase, telophase - This order is incorrect, as anaphase should occur after metaphase.
- Option 3: interphase, prophase, metaphase, telophase - Interphase is not one of the stages of mitosis, so this order is incorrect.
- Option 4: prophase, metaphase, anaphase, telophase, G1 phase - G1 phase is part of the cell cycle, not mitosis, so this order is also incorrect.
Therefore, the correct answer is prophase, metaphase, anaphase, telophase.