LESSON PLAN IN BIOLOGY II.doc

7/27/2019 LESSON PLAN IN BIOLOGY II.doc

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A Detailed Lesson Plan in Biology II

I. Objectives: At the end of the lesson, the student will be able to:

a. identify and explain each stage/phase of mitosis

b. exhibit willingness to help one another in performing the activities assigned to

the group

c. handle and manipulate the microscope and prepared slide properly

II. Subject Matter

Topic: Mitosis

Source: Science and Technology Textbook for Second Year Biology Textbook

II SEDIP

Materials: prepared slides/specimen, microscope, instructional materials

Background Knowledge: Mitosis occurs in most multicellular organisms

Values: Cooperation within the group is needed in

an activity to arrive at a correct observation

III. Procedure

Teacher's Activity Student's Activity

A. Preparation:

Good afternoon class!Before anything else, let us first stand

up and start our class with a prayer.

How are you today?

Well are you ready to lend your ears for

our discussion today?

B. Motivation:

( Giving of Trivia )

Class, did you know that the biggestorganism in the world is the blue whale

which is composed of 100 quadrillion

cells?

The human body is composed of

approximately 50 - 75 trillion cells.

While the smallest organism in the world

is amoeba which is composed of only one

cell!

Ok class, I want you to look under your

chair. You will see a piece of colored

paper. For those who have the same

colored paper, group yourselves.

I will be giving each group a brown

envelope. Inside the envelope are the cut-

out picture and your task is to put them

Good afternoon teacher!

Were okay teacher.

Yes teacher.


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together to find out what is the mystery

creature.

Do the activity for 5 minutes.

(after 5 minutes...)

Group 1, what is the mystery creature that

you have formed?

How about the group 2?

For the Group 3, what is the mystery

creature?

How about the group 4?

C. Presentation of the lesson

Our lesson for today is related to the

activity we had. Since these animals are

composed of cell. These cells carry on

many functions needed to sustain life.

They grow and divide, thereby producing

more cells. This cell division is referred

to as mitosis.

Today, we will be tackling about theprocess of mitosis.

For you to have an in depth

understanding of our lesson today, we

will have an activity. Again, group

yourselves with the same group you have

on the first activity.

We will be giving worksheets as yourguide and where you can also put your

notes and answers.

(distribute the worksheets)

Instruction:

Cells do not divide at the same time.

Thus, in the slide, you will find cells at

different stages of mitosis. With the LPO,

locate and study the cells at these stages.

Then switch to the HPO to study the

nucleus in detail. Answer also the

questions given in your worksheets.

Tiger

Bird

Eagle

Manatee/Dugong


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Activity 5.1 Observing Mitosis

Materials:

prepared slides of the onion root tip

microscope

1. Study the different stages of mitosis

in onion root tip in the figure below.

Q1. What happens to the structures in

the nucleus in each stage?

Q2. What happens to the cytoplasm?

Q3. What happens to the cell wall?

2. Observe the these stages in a

prepared slide of onion root tip cells

under the low power objective (LPO),

then in high power objective (HPO).

(After the observation...)

For the Group 1, report your findings

about PHOPHASE base on what you

have observed under the microscope.


about METAPHASE base on what you



about ANAPHASE base on what you



about TELOPHASE base on what you


From other groups, do you have a

question to the report of group 1, group 2,

group 3, group 4.

Report on Prophase

Report on Metaphase

Report on Anaphase

Report on Telophase

Questions from each group


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Based on your observation and report,

what concept did you get from our

activity?

What did you felt upon finishing the

activity and coming up with correct

observation?

Were you able to appreciate the value of

cooperation within the group?

D. Discussion

Since our topic for today is focused on

mitosis, who can give an idea of what

mitosis is?

Ms. Rissa, what is your idea of mitosis?

Very good explanation!

For elaboration, mitosis is a way of

dividing the replicated chromatin into

two similar and equal parts. Each of these

parts is passed on to two new nuclei.

Mitosis has four stages namely

PROPHASE, METAPHASE,ANAPHASE, and TELOPHASE.

Look at the first stage which is the

prophase. What did you observe in the

illustration?

Ok, Mr. Yute, what is happening inside

the cell in the illustration? Describe.

Good!

(answers may vary)

cells undergo mitosis

mitosis occurs in most organisms

mitosis is the division of cell

We are overwhelmed and we found out

that there is a need for us to cooperate in

order to arrive at a correct and precise

observation.

Yes teacher.

According to what I have read and myobservations too, mitosis is the division

of a single parent cell into two new

daughter cell.

As what I have observed, there is a dense

and dark spot on the cell.


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In stage 1, prophase, the chromosomes

are thicker and shorter because of

repeated coiling. At this stage, the

chromosomes are double-stranded. Each

strand is called a chromatid. The two

chromatids produced from the one

chromosome are still attached at one

point, called the centromere or

kinetochore. The nuclear membrane and

nuclei may still be present.

I will show you a short video clip on

prophase.

(Show video clip...)

Lets proceed to the second stage the

metaphase.

What did you observe in the illustration?

Ok, Ms. Stefani, what is happening now

inside the cell in the illustration?

Describe.

Ok. Good!

In stage 2, metaphase, the spindle is at the

center of the cell where the nucleus usedto be. The nuclear membrane has

disappeared. The chromatids are almost

at the middle of the spindle. Each

centromere of the sister chromatids is

attached to a single spindle fiber.


metaphase.

(show the video clip)

Lets proceed to the third stage the

anaphase.

What did you observe in the illustration?

Ok, Ms. Chengrose, what is happening

now inside the cell in the illustration?

Describe.

As what I have observed, the dark spotstarts to form at the middle of the cell.


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Good!

In stage 3, anaphase, the centromere

initially divides and the new single-

stranded chromosomes move away from

each other toward the opposite poles of

the spindle. These new chromosomes

come from chromatids of double-strandedchromosomes formed in the prophase and

the metaphase stages.


anaphase.

(show a video clip)

Finally, lets proceed to the fourth stage,

the telophase.What did you observe in the illustration?

Ok, Mr. Jerry, what is happening now

inside the cell? Describe.

Ok, good!

In stage 4, telophase, the chromosomes

are now at opposite poles of the spindle.

They have started to uncoil and become

indistinct under the light microscope. A

new nuclear membrane may have formed

around them. The spindle may have

disappeared.


telophase including cytokinesis.

(show a video clip)

E. Wrap-up/Closure

Since we had already finished our activity

As what I have observed, the dense or

dark spot divides into two and it goes on

the opposite side of the cell.

As what I observed, the dense spot is at

both ends and is already dividing into two

new cells.


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Prepared by: Pablo A. Ragay Jr.

BSED-II major in Biology

Documents

LESSON PLAN IN BIOLOGY II.doc