Lab 3 Mitosis and Meiosis BIO201L
Student Name:
Access Code (located on the lid of your lab kit): AC-AQW1GW
Lab Report Format Expectations
Utilize college level grammar and professional formatting when completing this worksheet.
Submissions without proper formatting, all required photos or sufficient responses will be rejected. Pre-
lab Questions
1. What are chromosomes made of?
Within eukaryotic cells, the nucleus serves as the repository of essential genetic information,
neatly arranged into chromosomes. These chromosomes efficiently store long DNA strands,
intricately bound with histone proteins. Here, the genetic blueprint governing our existence lies
dormant yet poised for expression, crucial for guiding our growth and functioning.
2. Compare and contrast mitosis and meiosis, ensuring to detail the differences in both function
and in process. (Hint: Your response should be 4-5 sentences long.)
Mitosis and meiosis represent distinct processes in cell division with different outcomes. Mitosis
results in the creation of two identical daughter cells, essential for growth, repair, and asexual
reproduction. Conversely, meiosis generates four genetically diverse cells, crucial for sexual
reproduction and the diversity of offspring.
3. Cancer is a disease related to uncontrolled cell division. Investigate two known causes for these
rapidly dividing cells and use this knowledge to invent a drug that would inhibit the growth of
cancer cells. (Hint: Your response should be 4-5 sentences long.)
Mitosis and meiosis represent distinct processes in cell division with different outcomes. Mitosis
results in the creation of two identical daughter cells, essential for growth, repair, and asexual
reproduction. Conversely, meiosis generates four genetically diverse cells, crucial for sexual
reproduction and the diversity of offspring.
,Lab 3 Mitosis and Meiosis BIO201L
EXPERIMENT 1: OBSERVATION OF MITOSIS IN A PLANT CELL
Introduction Questions
1. State how you will calculate the number of hours each stage of mitosis takes based on
observations. Do so by either stating the “Hours of Stage” equation, or by discussing the
equation and its application. If you decide to insert an equation, you must use an equation
editor to properly state the equation with the correct symbols and fraction format.
Two methods can be employed to calculate the duration of mitosis stages based on
observations:
1. Time-lapse microscopy involves tracking cells labeled with markers and averaging the time
spent in each stage.
2. Fixed-cell counting estimates the total cycle time, counts cells in each stage, and multiplies
the proportion by the cycle time to determine stage duration.
The equation for method 2 is: Stage Duration (hours) = Cycle Time (hours) * Percentage of Cells
in Stage / 100.
2. In Table 1, below, predict how many hours of the 24-hour cell cycle you think each step takes.
Ensure you provide robust supporting evidence to back your prediction.
Table 1: Mitosis Predictions
Following mitosis, two daughter cells are produced, each genetically
Predictions identical to the parent cell, containing an exact copy of the original set
of chromosomes.
Mitosis is a cellular division process that results in the creation of two
daughter cells, both genetically identical to the parent cell and
Supporting Evidence
possessing a full complement of chromosomes.
, Lab 3 Mitosis and Meiosis BIO201L
Data and Observations
Record your observations in the table below. Based on those observations, calculate the percentage of
time spent in each phase of mitosis.
Table 2: Mitosis Data
Chosen Image Onion root tip, 100x.
Number of Cells in Calculated % of Time
Stage Total Number of Cells
Stage Spent in Stage
Interphase 24 27 89
Prophase 1 27 3.75
Metaphase 0 27 2.75
Anaphase 1 27 3.75
Telophase 0 27 0
Cytokinesis 1 27 3.75
Student Name:
Access Code (located on the lid of your lab kit): AC-AQW1GW
Lab Report Format Expectations
Utilize college level grammar and professional formatting when completing this worksheet.
Submissions without proper formatting, all required photos or sufficient responses will be rejected. Pre-
lab Questions
1. What are chromosomes made of?
Within eukaryotic cells, the nucleus serves as the repository of essential genetic information,
neatly arranged into chromosomes. These chromosomes efficiently store long DNA strands,
intricately bound with histone proteins. Here, the genetic blueprint governing our existence lies
dormant yet poised for expression, crucial for guiding our growth and functioning.
2. Compare and contrast mitosis and meiosis, ensuring to detail the differences in both function
and in process. (Hint: Your response should be 4-5 sentences long.)
Mitosis and meiosis represent distinct processes in cell division with different outcomes. Mitosis
results in the creation of two identical daughter cells, essential for growth, repair, and asexual
reproduction. Conversely, meiosis generates four genetically diverse cells, crucial for sexual
reproduction and the diversity of offspring.
3. Cancer is a disease related to uncontrolled cell division. Investigate two known causes for these
rapidly dividing cells and use this knowledge to invent a drug that would inhibit the growth of
cancer cells. (Hint: Your response should be 4-5 sentences long.)
Mitosis and meiosis represent distinct processes in cell division with different outcomes. Mitosis
results in the creation of two identical daughter cells, essential for growth, repair, and asexual
reproduction. Conversely, meiosis generates four genetically diverse cells, crucial for sexual
reproduction and the diversity of offspring.
,Lab 3 Mitosis and Meiosis BIO201L
EXPERIMENT 1: OBSERVATION OF MITOSIS IN A PLANT CELL
Introduction Questions
1. State how you will calculate the number of hours each stage of mitosis takes based on
observations. Do so by either stating the “Hours of Stage” equation, or by discussing the
equation and its application. If you decide to insert an equation, you must use an equation
editor to properly state the equation with the correct symbols and fraction format.
Two methods can be employed to calculate the duration of mitosis stages based on
observations:
1. Time-lapse microscopy involves tracking cells labeled with markers and averaging the time
spent in each stage.
2. Fixed-cell counting estimates the total cycle time, counts cells in each stage, and multiplies
the proportion by the cycle time to determine stage duration.
The equation for method 2 is: Stage Duration (hours) = Cycle Time (hours) * Percentage of Cells
in Stage / 100.
2. In Table 1, below, predict how many hours of the 24-hour cell cycle you think each step takes.
Ensure you provide robust supporting evidence to back your prediction.
Table 1: Mitosis Predictions
Following mitosis, two daughter cells are produced, each genetically
Predictions identical to the parent cell, containing an exact copy of the original set
of chromosomes.
Mitosis is a cellular division process that results in the creation of two
daughter cells, both genetically identical to the parent cell and
Supporting Evidence
possessing a full complement of chromosomes.
, Lab 3 Mitosis and Meiosis BIO201L
Data and Observations
Record your observations in the table below. Based on those observations, calculate the percentage of
time spent in each phase of mitosis.
Table 2: Mitosis Data
Chosen Image Onion root tip, 100x.
Number of Cells in Calculated % of Time
Stage Total Number of Cells
Stage Spent in Stage
Interphase 24 27 89
Prophase 1 27 3.75
Metaphase 0 27 2.75
Anaphase 1 27 3.75
Telophase 0 27 0
Cytokinesis 1 27 3.75
