Warm-Up (1/17)
Answer the following questions, and explain in a
complete sentence why each answer is correct.
1. The process shown in the diagram is:
a. DNA replication
b. RNA replication
c. Transcription
d. Translation
2. If you scratch your skin and lose a bunch of cells,
what will the living skin cells do to repair your skin?
Name
Date
Period
Meiosis
UNIT
8
Meiosis
Somatic cells – all cells of your body
except your gametes.
Gametes – sperm or egg cells.
Cell Cycle: making a somatic cell
G1
normal
life

S

DNA
replication
G2
cell
grows
 Mitosis
chromosomes
separate, then
cytokinesis
Meiosis
Cell Cycle: making a somatic cell
G1
normal
life

S

DNA
replication
Amount of DNA
G1  S 
2n
4n
G2
cell
grows
G2
4n
 Mitosis
chromosomes
separate, then
cytokinesis
 Mitosis
2n 2n
*n means # of chromosomes
2n 2n
Meiosis
MEiosis: making a gaMEte cell
G1 S  G2  Mitosis  Mitosis
Again
Amount of DNA
2n
4n
4n
2n
2n 2n
n
n
2n
n
n
n
n
n
n
Meiosis
Summary
Cell cycle: chromosomes double 
cell divides 
two new identical SOMAtic cells,
daughter cells are identical
MEiosis:
chromosomes double 
cell divides 
cell divides again 
four new half (haploid) gaMEtes,
daughter cells are each unique
Your Assignment
Complete the diagram below ON A NEW PAGE OF YOUR
NOTEBOOK showing the steps of meiosis, starting with a
2n somatic cell that has 1 chromosome pair.
Step
1
DNA in
each cell
2n
# of cells
1
2
3
4
4n
5
6
2n
1
2
7
Closure
Answer the following question in a complete
sentence:
If mitosis makes two cells
each with the same amount of
DNA, how many cells does
meiosis make, with how much
DNA?
Name
Date
Period
Scale
from 1-10