Republic of the Philippines
Department of Education
Region XII
Greenfield National High School
Greenfield, Arakan, Cotabato
SEMI-DETAILED LESSON PLAN
School GREENFIELD NATIONAL HIGH SCHOOL (GNHS) Learning Area SCIENCE -LIVING THINGS AND THEIR ENVIRONMENT
Student-Teacher JOEL R. CABAÑAS, CHARLES DARWIN S. PORCADILLA Quarter 4th Quarter
Grade & section SCIENCE 8
I. OBJECTIVES
A. CONTENT STANDARDS 1. How cells divide to produce new cells
2. Meiosis as one of the processes producing genetic variations of the Mendelian Pattern of Inheritance
B. PERFORMANCE Report on the importance of variation in plant and animal breeding
STANDARDS
C. LEARNING Compare mitosis and meiosis, and their role in the cell-division cycle. S8LT-IVd-16
COMPETENCIES
Write the LC code for
each
SPECIFIC OBJECTIVES At the end of the lesson the students will be able to:
Cognitive: Describe the different phases of mitosis and their key characteristics.
Psychomotor: Arrange the phases of mitosis in chronological order.
Affective: Appreciate the role of mitosis in life.
II. CONTENT/SUBJECT
MATTER
CELLULAR REPRODUCTION AND GENETICS
Topic: Cell Division: Mitosis
Lesson:
III. LEARNING RESOURCES
A. References
1. Teacher’s Guide page/s
2. Learner’s Materials page/s Science 8 Learner’s Materials
3. Textbook page/s
DepEd MELC
4. Additional Materials from Tv/Projector
Laptop
LR
Chalk/Chalkboard
Activity sheets
B. Other Learning Resources www.google.com
IV. PROCEDURES (7E’s) Preliminary Activities:
1. Prayer
2. Greetings
3. Energizer
4. Checking of attendance
5. Reviewing Classroom Standards:
6. Passing of Assignment
Respect Everyone – Listen when others speak and be kind in words and actions.
Participate Actively – Stay engaged, ask questions, and share ideas.
Be Responsible – Complete tasks on time and take care of classroom materials.
Work Together – Help and support classmates in learning and activities.
Keep the Classroom Clean – Dispose of trash properly and keep desks tidy.
7. Other reminders
Don’t Copy
Take notes!
A. Reviewing previous Teacher: Good day everyone, what was our topic last meeting?
lesson or presenting Ans: Our topic last meeting is all about cell and chromosomes.
the new lesson Teacher: what is cell?
ELICIT Ans: Cell is the basic unit of life.
(5 minutes) Teacher: how about chromosome?
Ans: chromosome is a thread-like structure inside the nucleus made up of DNA and proteins.
Teacher: Since all of you can recall our last topic, lets move on to our new lesson.
B. Establishing a purpose Teacher: But before we proceed to our next lesson let us first have an activity.
for the lesson. Direction: Guess what is the correct sequence of the following pictures.
(Motivation and
Objectives)
Based in our activity what do you think is our lesson today?
Ans: Our lesson today is all about Cell Division (Mitosis)
But before we proceed with our discussion let’s first have our objective.
At the end of the lesson the students will be able to:
Describe the different phases of mitosis and their key characteristics.
Arrange the phases of mitosis in chronological order.
Appreciate the role of mitosis in life.
Activity 1: 4 PICS 1 WORD
C. Presenting
examples/instances of Direction: Identify the hidden word base on this picture.
the new lesson (Activity
#1)
ENGAGE
D. Discussing new The Cell Cycle
concepts and practicing The chromosomes of a cell change their form as they undergo cell transitions from one stage to another in a typical cell cycle as shown in Figure
new skills #1(Analysis 3. The cell cycle may be divided into two stages: the interphase where the chromosomes are long, and extended, and the cell division or mitotic
#1) phase where the chromosomes become condensed or thickened.
Interphase is the interval between two cell divisions. During this stage, the cell is not dividing; it merely grows. The chromosome doubles or
replicates itself because the DNA molecule contained in the chromosome produces a precise copy of itself.
Interphase is the interval between two cell divisions. During this stage, the cell is not dividing; it obtains nutrients and metabolizes, grows,
replicates its DNA in preparation for mitosis.
The interphase is divided into three sub-stages, namely:
1. First gap period or G1 where:
cell grows initially
synthesis of protein and ribonucleic acid or RNA occurs
mitochondria increase in number
2. Synthesis stage or S phase where:
DNA are synthesized thus replicating the chromosomes in preparation for the next cell division.
3. Second gap period or G2 where :
cell grows rapidly
cell prepares for the actual cell division
Cell Division
Cell division phase occurs every after interphase. In eukaryotic cells, these types of cell division occur: mitosis and meiosis.
1. Mitosis
Each time a child goes to the doctor, a nurse measures his height and mass. A child’s height and mass increases because the number of
cells in his body increases as he develops. Our body cells increase its number through the process known as mitosis.
Mitosis is a cellular process wherein two nuclei and two cells are produced due to the division of the original nucleus, each of which
contains the same chromosome number as the parent cell. Mitosis is divided into four stages namely: prophase, metaphase, anaphase,
and telophase. Figure 5 shows the different stages of mitosis.
Prophase Stage
The repeated coiling of chromosomes occurs resulted to its thicker and shorter structure. These are made up of two sister chromatids
that are identical to each because of the replication of DNA during the S phase.
The two chromatids are still attached at the centromere.
The nuclear membrane breaks down.
Metaphase Stage
Chromosomes align at the equatorial plane.
Each spindle fiber from both centrosomes connects to each chromosome through its kinetochore.
Anaphase Stage
Spindle fibers begin to contract and become shorter. Continued contraction causes the separation of the genetically identical sister
chromatids.
Centromeres divide.
The single chromatids move towards the opposite poles.
Telophase Stage
The chromosomes are now at the opposing poles of the spindle.
The microtubules disappear.
Two sets of chromosomes are surrounded by new nuclear membranes, completing the nuclear division process known as karyokinesis.
Cytoplasmic division called cytokinesis occurs concurrently, splitting the cell into two.
What happens after telophase?
Two new nuclear membranes are formed, and two new nuclei are seen. There are two new daughter cells that are produced from one
dividing parent cell. Thus, mitosis has come to an end.
Cytokinesis
-is the final step of cell division in both plant and animal cells, when the cytoplasm is split into two identical daughter cells.
E. Discussing new
concepts and practicing
new skills #2 (Activity
and Analysis #2)
EXPLORE
T
E
L
O
P
M H
P R O P H A S E A
T S
A N A P H A S E
P
H
I N T E R P H A S E
S
E
Across
1. The two chromatids are still attached at the centromere.
2. Spindle fibers begin to contract and become shorter. Continued contraction causes the separation of the genetically identical
sister chromatids.
3. During this stage, the cell is not dividing; it merely grows.
Down
4. Chromosomes align at the equatorial plane.
5. The chromosomes are now at the opposing poles of the spindle.
F. Developing mastery
(Leads to Formative
Assessment 3) Group Activity
(Activity/Analysis) quiz,
seat works, games, Direction: With your group, work on arranging the phases of mitosis chronologically using a 3D model provided.
worksheets, etc.
Rubrics:
EXPLAIN
Criteria 4 - Excellent 3 - Proficient 2- 1 - Needs
Developing Improvement
Accuracy All phases are Mostly correct, Some correct, Mostly incorrect.
correct. minor errors. noticeable
errors.
Teamwork All participate Most Uneven Minimal
actively. participate. participation. collaboration.
Understanding Strong Good Basic Little
knowledge knowledge, understanding understanding.
shown. minor gaps. , some
struggles.
G. Finding practical Think and Reflect
application of concepts
and skills in daily living Why is mitosis considered essential for the growth and development?
(Application/Valuing)
Ans: Mitosis is essential for growth and development because it produces new cells needed to increase the size of an organism and
replace old or damaged cells.
How can an understanding of mitosis help us understand the process of wound healing?
Ans: Understanding mitosis helps us understand wound healing because it shows how cells divide to replace damaged tissue and close
the wound.
H. Making generalization Activity
and abstraction about
the lesson. Direction: Complete the following statements using your own words and understanding the topic
ELABORATE I generalized that mitosis is _________________________________________.
I conclude that mitosis is important for ______________________________________________.
I generalized that the stages of mitosis are __________________________________________________.
I. Evaluating learning Multiple Choice
EVALUATION
1. What happens during interphase?
A. Chromosomes align
B. DNA replicates
C. The nucleus reforms
D. Chromosomes separate
2. What occurs in prophase?
A. Chromosomes split
B. DNA replicates
C. Chromosomes condense
D. The cell grows
3. In which stage do chromosomes align at the center?
A. Anaphase
B. Chromosomes condense
C. Telophase
D. Metaphase
4. What happens during anaphase?
A. Chromosomes separate
B. DNA copies
C. Two nuclei form
D. The cell divides
5. What is the final step that completes cell division?
A. Prophase
B. Cytokinesis
C. Metaphase
D. Anaphase
J. Additional Activities for Assignment:
application/ remediation.
Research and read in advance what is Meiosis.
EXTEND
V. REMARKS
Suspension, continuation of
lesson plan in case of re-
teaching or lack of time, etc
VI. REFLECTION
What went right or what
went wrong
A. No. of learners who
earned 80% in the
evaluation
B. No. of learners who
require additional activities
for remediation
C. Did the remedial
lesson work?
No. of learners who have
caught up with the lesson
Prepared by: Checked by:
JOEL R. CABAÑAS JAY MARIE S.
MALLORCA
Student-Teacher Cooperating Teacher
