Meiosis
Textbook Sections 6.2, 6.5 and 6.6
And video https://www.youtube.com/watch?v=toWK0fIyFlY
How many chromosomes
do all of your body cells
(nerve cells, skins cells,
muscle cells) have?
What is the reason for
these different numbers?
How many chromosomes
do sperm and egg cells
have?
_______________________
_______________________
_______________________
_______________________
_______________________
What is the scientific name
for sperm and egg cells?
Meiosis is also know as ______________________ ______________________.
Because the number of
To ...
____________________
are reduced from:
How are the end results of mitosis and meiosis different?
Mitosis: __________________________________________________________
Meiosis: __________________________________________________________
Haploid
What is it?
Diploid
What is it?
____________________________
____________________________
____________________________
____________________________
____________________________
____________________________
What part of the cell cycle happens before both mitosis and meiosis?
_____________________________
What is happening during this stage?
__________________ and _____________________ and _________________
Mitosis and meiosis both have the same basic names for their phases. List
those four names:
P______________, M_______________, A______________, T_____________
But meiosis is different. How and why?
How: ____________________________________________________________
Why: ____________________________________________________________
Review What does homologous mean? Write or draw a description.
Meiosis, phase 1 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. Nucleus _______________________
2. Chromosomes _________________
and ___________________________
What process do these pictures show? __________________ _____________
__________________ chromosomes ___________
______ with each other during _______________.
Some _________________ are very close to each
other and _______________ _____________.
Some of these pieces ______________ _________
and reattach to the other ____________________
______________________.
Meiosis, phase 2 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. The chromosomes ______________
_______________________________
Meiosis, phase 3 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. Paired _________________________
_______________________________
2. Sister __________________________
_______________________________
Meiosis, phase 4 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. Cytokinesis ____________________
_______________________________
2. Each cell contains only __________
_______________________________
3. The cells are now _______________
Meiosis, phase 5 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. The nuclear membrane __________
_______________________________
2. The cells prepare _______________
_______________________________
Meiosis, phase 6 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. The chromosomes ______________
_______________________________
Meiosis, phase 7 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. The sister _____________________
and ___________________________
_______________________________
Meiosis, phase 8 of 8 is called: __________________
Draw what happens.
Describe what happens:
1. The nuclear membranes ______________ ______________.
2. The result of meiosis is ____________ ___________________ _________
with a combination of __________________________ from both the
__________________ and _____________________.
In males, all of the __________________ _______________ made in
meiosis are turned into ___________________.
But in females, only some of the __________________ _____________
made in meiosis are turned into ________________. The other ones
become _________________ ____________. These are eventually
___________________ _______________,
Name: _______________________________________ Period: ___________
When does crossing over happen? ___________________________
How would you be able to tell if two chromosomes are homologous?
_____________________________________________________________
_____________________________________________________________
How would you know if this is Metaphase I or Metaphase II?
______________________________________________
______________________________________________
What would happen if Interphase didn’t occur?
____________________________________________________________
Circle whether the statement applies to Mitosis or Meiosis or both.
Interphase occurs once before the process begins.
Both / Mitosis / Meiosis
Process ends with identical cells.
Both / Mitosis / Meiosis
Produces gametes.
Both / Mitosis / Meiosis
Produces fours cells that each have 23 chromosomes.
Both / Mitosis / Meiosis
Crossing over occurs.
Both / Mitosis / Meiosis
Produces somatic cells.
Both / Mitosis / Meiosis
Process is important for growth and repair.
Both / Mitosis / Meiosis
Produces diploid cells.
Both / Mitosis / Meiosis