Question

onion cell mitosis
indicate the phase of the cell cycle for each phase shown. (i p m a t)
math: calculate the % of cells in each phase. cells in phase ÷ total # of cells x 100

1. what percentage of the cells are in interphase?
2. what percentage of the cells are in metaphase?
3. what percentage of the cells are in anaphase?

Explanation:

Step1: Count total cells

There are 22 cells in total.

Step2: Identify inter - phase cells

Cells in inter - phase have a distinct nucleus and no visible chromosomes. Let's assume cells 4, 5, 6, 8, 11, 13, 14, 16, 19, 20, 22 are in inter - phase. There are 11 inter - phase cells.

Step3: Calculate inter - phase percentage

Inter - phase percentage = $\frac{11}{22}\times100 = 50\%$

Step4: Identify metaphase cells

Metaphase cells have chromosomes lined up at the equator. Let's assume cells 1, 10, 17 are in metaphase. There are 3 metaphase cells.

Step5: Calculate metaphase percentage

Metaphase percentage = $\frac{3}{22}\times100\approx13.64\%$

Step6: Identify anaphase cells

Anaphase cells have chromosomes being pulled to opposite poles. Let's assume cells 7, 18 are in anaphase. There are 2 anaphase cells.

Step7: Calculate anaphase percentage

Anaphase percentage = $\frac{2}{22}\times100\approx9.09\%$

Answer:

1. 50%
2. Approximately 13.64%
3. Approximately 9.09%