Question

Most of the diversity in the rates of cell division in the adult body lies in variations in the time that each cell spends in which phase(s)?

Answer 1

Most of the diversity in the rates of cell division in the adult body lies in variations in the time that each cell spends in the G1, S, G2, and M phases of the cell cycle.

Step-by-step explanation:

In the cell cycle, most of the diversity in the rates of cell division in the adult body lies in variations in the time that each cell spends in the G1, S, G2, and M phases.

1. G1 phase: This phase is the first gap phase and lasts approximately 9 hours in rapidly dividing human cells with a 24-hour cell cycle.
2. S phase: This phase is the synthesis phase and lasts approximately 10 hours in rapidly dividing human cells.
3. G2 phase: This phase is the second gap phase and lasts about 4.5 hours.
4. M phase: This phase is the mitotic phase and lasts approximately 0.5 hours. It includes the stages of prophase, metaphase, anaphase, telophase, and cytokinesis.

These variations in the time spent in each phase contribute to the overall diversity in rates of cell division in the adult body.