Cell with chromosomes
B. _____________
inside the nucleus
Chromosomes are
made of sections of
DNA called genes.
Genes are
always in
pairs.
Each
chromosome
has many
gene pairs.
DNA
sugars
nitrogen bases
Purposes of
Cell Division
fold
Purposes of
C
e
l
l
D
i
v
i
s
i
o
n
cut
in Humans
Purpose: Cell division for
reproduction creates
offspring with traits from
both mother and father.
makes
Called:
MEIOSIS
MOM
DAD
X X
X X
X X
X X
sperm
egg
/
/
/
/
/
/
/
/
/\
/\
/\
/\
offspring
(reproduction)
Purpose: Cell division for
growth and repair creates
exact copies of a cell.
Called:
MITOSIS
“My toe-sies”
X X
Skin
X X
Cell
X X
Skin
X X
Cell
exact copy
(growth & repair)
Quick Quiz:
me
1. Meiosis makes _____.
reproduction
2. The purpose of meiosis is ______________.
half the
3. Meiosis create egg and sperm cells with _____
original chromosomes.
offspring
4. Egg and Sperm combine to create an __________
with unique traits.
copy machine
5. Mitosis can be compared to a ______________.
copy of the original cell.
6. Mitosis makes exact ______
growth and _______
repair
7. The purpose of mitosis is ________
of organisms.