Name:__________________________
MEIOSIS – SEXUAL REPRODUCTION
What does
HOMOLOGOUS mean?
What are HOMOLOGOUS
CHROMOSOMES?

How many PAIRS of
chromosomes do
humans have?


OBJ 3.2.1
HOMOLOGOUS CHROMOSOMES
__________________
Chromosomes of the same ________________ with the same ________________ types,
but 1 is from the ________________ and 1 is from the ________________
HAPLOID CELLS
What is HAPLOID?

Haploid: 1 set of _______________________ from ____________parent

______

We have a haploid number of chromosomes in _____________ and
________________ cells

Haploid = ______________________
What is DIPLOID?
What letter is it
represented by?
Which cells have a
DIPLOID chromosomes
number?
MEMORY TRICK


DIPLOID CELLS
_________ sets of chromosomes, one set from each __________________
_________

We have 46 total chromosomes in our ________________ (_________cells)

Diploid = _____________________________________
What is a SOMATIC
CELL?


CELL TYPES
Somatic Cells: “______________ CELLS”
Cells NOT for _________________________
What type of cell
division makes SOMATIC
cells?
Haploid or Diploid?

Made by _________________ cell division (_______________ reproduction)

Are _________________________ (2 sets of chromosomes)
What letter is it
represented by?
Which cells have a
Haploid chromosomes
number?
MEMORY TRICK
Examples:



Animal:
Plant:
Name:__________________________
OBJ 3.2.1
What is a GAMETE CELL?

Gamete Cells: “__________CELLS”
-Cells ______________________ for reproduction
What type of cell
division makes GAMETE
cells?
Haploid or Diploid?
Examples:

Made by ____________________ cell division (sexual reproduction)
What TYPE of CELLS
does it produce?
What is the whole
reason for MEIOSIS?
Are gametes HAPLOID or
DIPLOID?

 Are ________________________ (1 set of chromosomes)
Animal:

Plant:
•
•
•
MEIOSIS
Produces _____________________ CELLS (__________ cells)
The whole reason for meiosis is for
__________________________________________to take place.
Gametes have a _____________________ number of chromosomes
– so they can come together to form a new _____________________.
Which organisms use
MEIOSIS cell division?
-_____________________
-____________________
-_____________________
KEY FACTS:
• DNA ________________________ before division
• # of divisions: __________
• # of daughter cells: __________
• Daughter cells are ________________________________ (genetic variation!)
Name:__________________________
Cell Type
Body or Sex cell?
OBJ 3.2.1
MITOSIS vs. MEIOSIS
Gametes
Somatic cells
Made by what type of cell
division (mitosis or meiosis)
Haploid or Diploid
Number of chromosomes (n or
2n)
# of chromosomes in humans
Animal examples
Plant examples
Number of cell divisions?
Genetic stability or variation?
Type of reproduction (sexual or
asexual)
STEPS TO SEXUAL REPRODUCTION
MEMORY TRICKS
M =
I=
T=
O=
S=
I=
S=
_______________________  _________________
M=
E=
I=
O=
S=
I=
S=
__________________  __________