Question

onion cell mitosis
name:

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 $div$ total # of cells $\times$ 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: Classify cells by phase

First, identify each cell's phase (I=Interphase, M=Metaphase, A=Anaphase, T=Telophase, P=Prophase):
1: M, 2: P, 3: T, 4: I, 5: I, 6: I, 7: A, 8: I, 9: T, 10: M, 11: I, 12: I, 13: I, 14: I, 15: P, 16: I, 17: M, 18: A, 19: I, 20: I, 21: P, 22: I

Count totals:

• Interphase (I): 13 cells
• Metaphase (M): 3 cells
• Anaphase (A): 2 cells
• Total cells: 22

Step2: Calculate % for Interphase

Use formula: $\frac{\text{Cells in phase}}{\text{Total cells}} \times 100$
$\frac{13}{22} \times 100 \approx 59.09\%$

Step3: Calculate % for Metaphase

$\frac{3}{22} \times 100 \approx 13.64\%$

Step4: Calculate % for Anaphase

$\frac{2}{22} \times 100 \approx 9.09\%$

Step5: Compile phase table

Map each cell to its phase as classified.

Answer:

Phase Classification Table:

Cell #	Phase	Cell #	Phase
2	P	13	I
3	T	14	I
4	I	15	P
5	I	16	I
6	I	17	M
7	A	18	A
8	I	19	I
9	T	20	I
10	M	21	P
11	I	22	I

1. $\approx 59.1\%$
2. $\approx 13.6\%$
3. $\approx 9.1\%$