MARCIAL O. RAÑOLA MEMORIAL SCHOOL
Guinobatan, Albay
LESSON PLAN IN SCIENCE 8
For Demonstration Teaching
School Year 2016-2017
D
ate: January 27, 2017
I.
OBJECTIVES/ INTENDED LEARNING OUTCOMES
At the end of the lesson the students are expected to;
 Identify and describe the stages of mitosis;
 Differentiate cytokinesis in animal cell and plant cell;
 Apply the importance of mitosis in everyday life.
II.
SUBJECT MATTER
A. TOPIC: Mitosis
B. REFERENCES:
Grade 8 Learners Module 5 Unit 4, Pages 321-322
Grade 8 Teachers Guide Module 5 Unit 4, Pages 323-324
Biology Prentice Hall by Miller and Levine, Teachers Edition,
Pages 246-248
Biology 9th Edition by Raven, Pages 194-197
C. SCIENCE CONCEPTS
Chromosomes are made up of DNA which carries the cells
coded genetic information and proteins.
Spindle fibers form a protein structure that divides the genetic
material in a cell.
Centrioles a minute cylindrical organelle near the nucleus in
animal cells, occurring in pairs and involved in the development
of spindle fibers in cell division.
Mitosis is nuclear division plus cytokinesis, and produces two
identical daughter cells during prophase, prometaphase,
metaphase, anaphase, and telophase.
Prophase is when the chromatin condenses into two rod-shaped
structures called chromosomes in which the chromatin becomes
visible.
Metaphase the second stage of cell division, between prophase
and anaphase, during which the chromosomes become attached
to the spindle fibers.
Anaphase the stage of meiotic or mitotic cell division in which
the chromosomes move away from one another to opposite poles
of the spindle.
Telophase where chromosomes are clustered at opposite poles
and condense. Nuclear envelopes re-form around chromosomes
and Golgi complex and ER re-form.
Cytokinesis is the physical process of cell division, which
divides the cytoplasm of a parental cell into two daughter cells.
Cleavage furrow is the formation and ingression during animal
cytokinesis
Cell plate a plate that develops at the midpoint between the
two groups of chromosomes in a dividing cell and that is
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involved in forming the wall between the two new daughter
cells.
Karyokinesis is nuclear division
Diploid cells having a complete set of chromosome.
D. SCIENCE PROCESSES:
Inquiry, differentiating, observing and identifying
E. MATERIALS: Laptop, LCD projector, references, pictures,
Power point, Mitosis models and visual aids.
TEACHERS ACTIVITY
III. PRELIMINARY ACTIVITY
“Good morning students”
STUDENTS ACTIVITY
“Good morning Ma’am”
Cleaning of assigned areas.
“Are all the areas clean?”
“Yes Ma’am”
“Very good. Before we start let us Students will pray.
pray first. Christine please lead the
prayer”
“Okay class you may take your seats”
“None Ma’am”
“Class monitor who is absent today”
“Very good I’m glad that everyone is
present. Check your areas if it’s
already clean. Don’t forget to pick up
the pieces of paper.”
“Yes Ma’am”
“Are you excited to learn a new topic
this morning?”
“Before we proceed to our next “The cell cycle and parts of a
discussion lets first have a recap. chromosome”
What was our lesson yesterday?”
“Very good. We are already done
discussing the Cell cycle. Today we
will proceed to the next topic. Let’s try
to explore how cells present in our
body divides and multiply.”
IV.
LESSON PROPER
ELICIT (3 minutes)
“Do you believe that we are made up
“Yes Ma’am”
of cells?”
“Did you know that there are two
general types of cells that exist in the
body of organisms. What do we call “Somatic cells and germ cells”
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these two cells?”
“That’s right! What is the difference “Somatic cells are cells that do not
between somatic cells and germ participate directly in sexual
cells?”
reproduction while germ cells are
reproductive cells”
“Blood cells, epithelial cells, bone
“Can you give examples of somatic cells and other differentiated cells
cells and germ cells?”
are example of somatic cells while
sperm and ovum are examples of
germ cells”
“Very good! Today we will focus on
somatic cells.”
ENGAGE (3 minutes)
Presentation of Pictures
“Have you had a really big cut on your “Yes Ma’am”
skin?”
“It’s no longer present Ma’am”
“What happens to your wound after a
few days?”
“What do you think happened? Why Students will share their ideas.
do our wounds heal?”
“Okay, how about when you cut your
nails and hair? Why do you think that
after several days you notice that it’s a “It’s because our cells divide to
produce new cells”
lot longer from the last time you cut
it?”
“We will not grow, develop and
repair damage tissues”
“Yes, that’s right! What do you think
will happen if all of our cells stops to
divide?”
“Mitosis”
“Very good your idea is right! What do
we call this process that makes
“Mitosis is a part of the cell cycle
growth, development and repair of
when replicated chromosomes are
tissues possible?”
separated into two new nuclei.”
“Right! It is termed as Mitosis. Who
can define mitosis?”
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“Correct!”
“Very good! Today we are going to
investigate the process by which cells
make exact copies of themselves.
Bone cells repair bone cells, hair cells
cause your hair to grow, and new
fingernails grow to replace broken
ones. Practically every cell in your
body is capable of making a copy of
itself through the process of mitosis.”
EXPLORE (15 minutes)
The class will be divided into 5 The students will identify and
groups. Each group will be given a describe what happens in the
stage of mitosis assigned to them.
model of one stage of mitosis.
By using the model given they will
brainstorm about the important
events that occur in each stage.
EXPLAIN (10 minutes)
After the activity, the teacher will let Each group will describe in front
of the class the important events
each group present their work.
that happens in each phase of
mitosis.
ELABORATE (19 minutes)
“If you can recall the previous topic
we discussed about the cell cycle.
What is longer interphase or M “Interphase”
phase?”
“Cells grow”
“Very
good.
What
happens
in
“Cells divide”
interphase?”
“What happens in mitosis?”
“Very good. In order to develop and
regenerate new cells mitosis occurs. “Prophase,
Biologist divided the events of mitosis metaphase,
into four phases. What are these telophase”
phases?”
prometaphase,
anaphase
and
“In
prophase
chromosomes
“Who can explain the things that condense and become visible.
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happen in prophase?”
Chromosomes appear as two sister
chromatids held together at the
centromere.
Cytoskeleton
is
disassembled; spindle begins to
form. Golgi and ER are dispersed
and nuclear envelope breaks
down.”
“Cohesin proteins”
“What holds the sister chromatids
together?”
“Prometaphase”
“Very good.
follows?”
After
“What are the
prometaphase?”
prophase,
changes
what
“Chromosomes
attach
to
during microtubules at the kinetochores.
Each chromosome is oriented such
that the kinetochores of sister
chromatid
are
attached
to
microtubules from opposite poles.
Chromosomes move to equator of
the cell.”
“What
is
the
difference
prometaphase to metaphase?”
“All chromosomes are aligned at
of the equator of the cell, called the
metaphase plate. Chromosomes
are attached to opposite poles and
are under tension.”
“What do we mean by metaphase “An imaginary line perpendicular
plate?”
to the spindle fiber.”
“Very good.”
“After the chromosomes are aligned at “Proteins holding centromeres of
the center. What happens in the sister chromatids are degraded,
anaphase?”
freeing individual chromosomes.
Chromosomes
are
pulled
to
opposite poles and spindle poles
move apart.”
“Right! What do you think happens in “The spindle shortens”
the spindle fiber during anaphase?”
“Yes, that’s why sister chromatids are
pulled on the opposite poles.”
“After the chromosomes moved in “Telophase where chromosomes
each pole. What is the next phase?”
are clustered at opposite poles
and
decondense.
Nuclear
envelopes
re-form
around
chromosomes and Golgi complex
and ER re-form.”
“Does cell division end there?”
“Yes Ma’am”
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“Not yet. Do you think the cell are
divided completely?”
“Not yet. The cell still needs to
undergo cytokinesis.”
“Very good. What is cytokines?”
“Cell division”
“Right! Cytokinesis occurs in animal
cells and plants cells completely. How
cytokinesis occurs in animal cells?”
“In animal cells, cleavage furrow
forms to divide the cells.”
“Very good! How about in plants “In plant cells, cell plate forms to
cells?”
divide the cells.”
“Correct!”
“After the end of cytokinesis what type “Diploid cells”
of cells are produced?”
“Very good!”
The teacher will use a hand technique
that illustrate how mitosis occurs. She The students will apply what they
will also ask her students to follow learn during discussion.
what she is doing.
“To sum up our discussion this
morning why does mitosis play a
significant role to our lives?”
EVALUATE (10 minutes)
I.
Match the pictures to each The students will answer the
following questions and identify
stage of Mitosis
each phase of mitosis.
A
B
C
D
E
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Which of the drawings A-E shows?
1. Prophase ______ (chromosomes
become visible and spindle fiber
forms)
2. Prometaphase _____
(chromosomes connect to the
spindle fiber)
3. Metaphase _____ (Chromosomes
align at the equator)
4. Anaphase _____ (Sister
chromatids separate)
5. Telophase _____ (new nucleus
forms at each end)
II.
Differentiate
Cytokinesis
in Plant cell and animal
cell
III.
Give one importance
mitosis to our life.
of
EXTEND
Answer the following questions:
1. What is Meiosis?
2. What happens during each
stage of Meiosis?
3. What
is
the
difference
between mitosis from meiosis?
4. What types of cells undergo
Meiosis?
5. Does Meiosis produce diploid
or haploid cells? Why?
6. Why is Meiosis important?
Reference material:
 Grade 8 Learners Module 5 Unit
4, Pages 324-327
Prepared by:
MA. SHARYLN
A. NAVIA
Student
Teacher
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Noted:
GLENDA D. DE LA TORRE
Cooperating Teacher
Approved:
LEA R.
PALIANGAYAN
Head Teacher III,
Science Department
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