Question

investigation 2: studying the effects of environment on mitosis
part 2: time spent in the phases of mitosis
hypothesis: if/then statement
materials:
-computer

• website:https://bit.ly/4dmhq2z

procedures:
our microscope test didnt work so we used a website

1. identify which phase of mitosis the cell pictured is in.
2. click on the phase that you identify it as.
3. continue until all the cells have been categorized.

table 1:

	interphase	prophase	metaphase	anaphase	telophase	total
number of cells

counting of cells:

1. count the number of cells in each phase.
2. record your data in table 1 above.
3. calculate the number of cells in each phase and record in table 2 given below. estimate time spent in each phase by using the equation:

% total= number of cells in stage ÷ total # of cells in all stages

1. calculate the number of time spent in each phase from the percentage of cells in that stage. (on average, it takes a cell 24 hours (1,440 minutes) for onion roots to complete the cell cycle.)

time spent= % of cells in stage x 1440 minutes = minutes of cell cycle spent in that stage

Explanation:

Step1: Count cells in each phase

Manually count and record number of cells in inter - phase, prophase, metaphase, anaphase and telophase in Table 1.

Step2: Calculate percentage of cells in each phase

Use the formula $\% \text{Total}=\text{Number of cells in stage}\div\text{total \# of cells in all stages}$ to find the percentage for each phase.

Step3: Calculate time spent in each phase

Multiply the percentage of cells in each stage by 1440 minutes (since it takes 1440 minutes for onion root cells to complete the cell cycle) using the formula $\text{Time spent}=\% \text{ of cells in stage}\times1440\text{ minutes}$.

Answer:

The answers will be the values filled in Table 1 (number of cells in each phase) and the calculated values for time spent in each phase in Table 2 (not shown in the problem but described in the steps). Without actual cell - counting data, specific numerical answers cannot be provided.