Calculating cell counts from stage percentages in mitosis

Steps:

• Identify the percentages for the two stages from the table: 45% for end of metaphase and 24% for the transition to anaphase.
• Calculate cells in end of metaphase: 45% of 500 = 0.45 × 500 = 225.
• Calculate cells in transition: 24% of 500 = 0.24 × 500 = 120.
• Match these values to the choice providing the correct pair of cell counts.

Why A is correct:

• A (225, 120) exactly matches the calculations for 45% and 24% of 500 cells, aligning with the percentage-to-count conversion in cell cycle analysis.

Why the others are wrong:

• B: 345 is 69% of 500, exceeding the 24% for transition.
• C: 380 is 76% of 500, exceeding the 45% for end of metaphase.
• D: Both 380 (76%) and 345 (69%) mismatch the given percentages.

Final answer: A