Mitosis FlipBook Quiz
1.
2.
3.
4.
5.
6.
7.
Mitosis results in __, genetically _________ cells.
a.
1, different
c. 2, different
b.
1, identical
d. 2, identical
What happens in metaphase?
a.
Chromatin coils to form visible chromosomes
b.
Chromosomes line up along the equator of the cell
c.
The sister chromatids are pulled apart to opposite poles of the cell
d.
Two distinct and identical daughter cells are formed
What are the phases of the cell cycle?
a.
Interphase, Postphase, Metaphase, Anaphase, Cytophase
b.
Exophase, Prophase, Milliphase, Anaphase, Cytophase
c.
Interphase, Prophase, Metaphase, Anaphase, Telophase
d.
Exophase, Postphase, Miliphase, Anaphase, Telophase
During what stage of the cell cycle is DNA replicated?
a.
Synthesis (S) stage c. Mitosis
b.
1st growth stage
d. Anaphase
Name the stage of mitosis to the right
a.
Prophase
c. Metaphase
b.
Anaphase
d. Telophase
Which structures contain genetic information that pass from cells to cells as they reproduce?
a.
Ribosome
c. Plasma Membrane
b.
Chromosomes
d. Spindle Fibers
Which term describes when the cytoplasm divides at the end of telophase?
a.
b.
Mitosis
Cell Plate
c. cytokinesis
d. cleavage furrow
Sexual Reproduction
Meiosis
Chapter 10
Key Terms from Mitosis that we
need to remember
• Chromosomes: structures that contain
genetic information that pass from cells to
cells as they reproduce
• Chromatin: the relaxed form of DNA in
the cell’s nucleus
• Sister chromatids: structures that contain
identical copies of DNA
Chromosomes: It’s all in the Genes
• Everyone in this class has characteristics
passed on to them by their parents
– These traits include height and
eye color
• Instructions for each trait are located
on chromosomes which are found in
the nucleus of cells
• Each chromosomes consists of
hundreds of genes
3 Main Phases of the Cell Cycle
1. Interphase
– Prophase
– Metaphase
– Anaphase
– Telophase
3. Cytokinesis
Cell grows, DNA is copied
2. Mitosis
Nucleus divides
New cell is created
Meiosis Overview
• Type of cell division or reduction division
• Our bodies make somatic cells through mitosis,
whereas our bodies make gametes or sex cells (ex: sperm
and egg cells) through meiosis
• A baby is first conceived when a male gamete (sperm) and
a female gamete (egg) combine in a process known as
fertilization.
• In meiosis, the number of chromosomes decreases from
diploid (2n=46 in humans) to haploid (n=23 in humans).
• One somatic cell divides into 4 gametes (sperm and eggs),
each with half the number of chromosomes as parent’s
somatic cell.
Meiosis Overview
• There are 9 phases of meiosis, with 2 cell divisions
– The steps of meiosis are similar to those of
mitosis
• Important difference: Mitosis results in two,
genetically identical cells, while meiosis results in
four, genetically different cells
• Therefore, meiosis is important because it results in
variation of genetic information
• Meiosis occurs in 2 phases: Meiosis 1 & Meiosis 2
Overview of Meiosis
PHASE OF
MEIOSIS
Pre-Meiosis:
INTERPHASE
Description
Cell grows in G Phase
Cell replicates its DNA
Genetic material duplicated (S Phase)
Chromatin condenses into chromosomes
MEIOSIS I
PROPHASE I
Homologous chromosomes come together
METAPHASE I
Homologous chromosomes align at the
middle of the cell
ANAPHASE I
Homologous chromosomes separate and
move to opposite poles of the cell
TELOPHASE I
Two new cells are formed Now have two
cells with half the number of chromosomes—2n
PROPHASE II
DNA does NOT replicate
Spindle apparatus forms
METAPHASE II
Chromosomes align at the middle of the
cell, NOT in homologous pairs
ANAPHASE II
Centromeres divide and sister chromatids
migrate separately to each pole
TELOPHASE II
Four haploid (n) ‘daughter’ cells created
MEIOSIS COMPLETE!
MEIOSIS II
“Crossing-over” occurs
Picture
Meiosis I.
• Prior to division, amount of DNA doubles
Crossing Over
• Segments of
homologous
chromosomes break
and reform at similar
locations.
• Results in new
genetic combinations
of offspring.
• This is the main
advantage of sexual
reproduction
Microscopic Images of Meiosis
Word Maps
Pick 2-3 words that you are unknown to you
Complete a word map for each word
Sentence
Explanation
Word
Draw an
example
Draw a
non-example
Gametes, somatic cells, meiosis, mitosis, diploid,
haploid, crossing over, homologous chromosomes,
gene, trait, variability
Meiosis Performance Task
Pick 2!!
1. Create a Meiosis book with pictures of each
phase and descriptions
2. Create a rap or song describing Meiosis
3. Write an editorial or newspaper article
explaining meiosis
4. Draw and explain the stages of Meiosis using
paper plates
You will have 50 minutes today to complete this
performance task
Venn Diagram: Mitosis v. Meiosis
Mitosis
Asexual reproduction
Meiosis
Sexual reproduction
*Type of cell
__ phases
__ phases
__ processes of division
__ process of division reproduction
__ new, unique cells
__ new, identical cells *Similar steps
*Both pass on
Forms ________
Forms _______ cells
genetic information
Requires __ parent
Requires __ parent
Requires ___ energy
Requires ___ energy
Occurs ______
Occurs ______
Occurs less frequently
Occurs frequently
_______ DNA as parent
____ DNA as parent
Venn Diagram: Mitosis v. Meiosis
Mitosis
Asexual reproduction
Meiosis
Sexual reproduction
*Type of cell
9 phases
4 phases
2 processes of division
1 process of division reproduction
4 new, unique cells
2 new, identical cells *Similar steps
*Both pass on
Forms gametes
Forms somatic cells
genetic information
Requires 2 parent
Requires 1 parent
Requires more energy
Requires less energy
Occurs slower
Occurs faster
Occurs less frequently
Occurs frequently
Different DNA as parent
Same DNA as parent
Lesson Closure
3 things you learned in class today
2 questions you have about the lesson
1 real-life connection