Name: ___________________________
Mitosis and Meiosis
Click the following link:
http://www.phschool.com/science/biology_place/labbench/lab3/intro.html
We are continuing to explore how mitosis and meiosis are different. Select 3-I Mitosis.
1. Key Concept I: Mitosis:
a. In mitosis, the parent cell produces two "daughter cells" that are genetically identical.
i. Define daughter cell: __________________________________________________________
b. Prior to both mitosis and meiosis, the chromosomes in the nucleus are _______________.
c. Recall that a gamete is: ____________________________________________________________
2. Click next concept: The Cell Cycle
a. The cell cycle is the orderly sequence of events that occurs from:
3. Click next concept: Nuclear Division
a. Fancy name for nuclear division: ________________________.
4. Click next concept: Interphase
a. Toward the end of interphase, new DNA is synthesized
and _________________________________.
b. Look at the diagram to the right. Answer each question.
i. Together both pieces are called: _____________________
ii. Separately each piece is called a: ___________________
5. Click next concept: Cytokinesis
a. the cytoplasm divides and two identical ______________________ are
formed.
6. Click next concept: Homologous Chromosomes.
a. A homologous chromosome has one chromosome from the _________________ and one from
the ________________.
7. Click next concept: Design and run the Experiment I.
Phase
Interphase
Prophase
Metaphase
Anaphase
Telophase
Total Number of Cells
Number of cells
Time (in minutes)
8. Take the quiz and record your score: ________________
On to Meiosis…
1. Click next Key Concept II: Meiosis.
a. Meiosis follows phases similar to those in_______________________.
b. Meiosis reduces the chromosome number of the parent cell so that ___________________ cells
are produced, each with one-half the chromosome number of the parent cell.
c. Each daughter cell contains only ___________________ chromosome from each homologous pair.
d. This is different in mitosis where ____________ daughter cells are produced.
2. Click next concept: Crossing Over.
a. When (what phase) does crossing over occur? ________________________
b. When homologous pairs of chromosomes come together it is called _____________________.
c. Draw how these chromosomes will appear after crossing over:
3. Click next concept: Design and run the Experiment II
a. In the photo, how many asci marked with an X showno evidence of crossing over? ____________
b. In the photo, how many asci marked with an X show evidence of crossing over? ____________
c. In the photo, what is the total number of asci marked with an X? _____________
d. What is the percent of crossovers? (number of asci with crossovers divided by total number of asci
multiplied by 100) ____________________
e. Note: ignore question 5.
4. Click next concept: Comparison of Mitosis and Meiosis
Mitosis
In mitosis, when do synapsis and crossing over occur? In
meiosis, when do synapsis and crossing over occur?
In what cellular processes is mitosis involved? In what
cellular processes is meiosis involved?
In what type of cells does mitosis occur? In what type of
cells does meiosis occur?
How many times does DNA replicate in mitosis? How
many times does DNA replicate in meiosis?
How many cellular divisions occur in mitosis? How many
cellular divisions occur in meiosis?
How many daughter cells are formed by mitosis? How
many daughter cells are formed by meiosis?
What is the chromosome number in daughter cells formed
by mitosis from diploid parent cells? What is the
chromosome number in daughter cells formed by meiosis
from diploid parent cells?
In mitosis, are daughter cells identical to or different from
parent cells? In meiosis, are daughter cells identical or
different from parent cells?
In mitosis, when do synapsis and crossing over occur? In
meiosis, when do synapsis and crossing over occur?
5. Take the quiz and record your score: ________________
Meiosis