Starter Feb. 24,
2010 Copy &
Answer
INSTRUCTIONS FOR FOLDABLE
• 1ST PAGE CELL CYCLE
1. INTERPHASE
2. MITOSIS
3. CYTOKINESIS
LABEL ALL PAGES 1-8
• 2ND PAGE INTERPHASE
DRAW LABEL AND COLOR
PHASE FROM PAGE 267
INSTRUCTIONS FOR FOLDABLE
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1.
2.
3.
4.
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3RD PAGE TITLE IS MITOSIS
PROPHASE
METAPHASE
ANAPHASE
TELOPHASE
PAGES 4-7 DRAW LABEL AND
COLOR THE FOUR PHASES
PAGE 207
PAGE 8 DESCRIBE CYTOKINESIS
FOR PLANT AND ANIMAL CELLS
DRAW LABEL AND COLOR
Meiosis
A type of cell division
Background Vocabulary
• Haploid: a cell with one
set of chromosomes
• Diploid: a cell with two sets
of chromosomes
• Gamete: sex cell
• Somatic cell: body cell
• Egg: female sex cell
• Sperm: male sex cell
More Background
• Somatic cells are diploid
cells
• Gametes are haploid cells
• In humans, diploid cells
have 46 chromosomes
• In humans, haploid cells
have 23 chromosomes
Meiosis
• Purpose: to make egg and
sperm cells
• Starts with one diploid
somatic cell
• Ends with four haploid
gametes
• Meiosis makes sexual
reproduction possible
• Sexual Reproduction: the
production and fusion of
haploid gametes
Overall Process of Sexual Reproduction
Man
Woman
Meiosis
Sperm
Egg
Fertilization
Zygote
Process of Meiosis
• Before meiosis can begin,
DNA replication has to
occur.
• Meiosis has two divisions,
each with four steps (total
of 8 steps)
• After chromosomes are
replicated, homologous
chromosomes pair up
Meiosis (cont.)
• Homologous chromosomes
line up in the center of the
cell, then separate.
• The cells split almost
completely into two cells
• In each of the two cells,
sister chromatids stay
paired
• Sister chromatids line up in
the center, then separate.
Meiosis (cont)
• The two cells divide to
become four cells
• One chromosome from
each pair goes into each
cell
Results of Meiosis
• Ends with four gametes
• Gametes are genetically
different
• Allows chromosome
number to remain constant
in species
 Vocabulary Squares for Vocabulary Page 263
Section 10.2 Meiosis. Each vocabulary square
should include word, definition,
diagram/drawing, and sentence using the
word.
 4 drawings Divide paper into 4 equal squares for
drawings. Draw, Label, and color the following:
Homologous Chromosome (p.265), Sexual
Reproduction (p.266), Crossing Over (p. 269
A,B,C), and Non-disjunction (p.271)
White Paper Rulers Color Pencils on Cart.
*Read pages 263-273 Section 10.2 Meiosis
MITOSIS CELL DIVISION DRAWINGS and
VOCABULARY
Definitions Page 201 ALL 17 TERMS
DRAW, LABEL, AND COLOR:
Fig. 8.10 Page 205 Chromosome Only
Fig. 8.11 Page 206
Fig. 8.13 Page 207 A, B, C, and D
Read pages 201-210
Homework: Write vocabulary words and
definitions 2 times each; Review notes