GENETICS

The concept of variation.

By the end of the lesson, the learner should be able to:


Define Genetics.
Define variation.

Exposition of new concepts.
Probing questions on some variations in human beings.
Observe some variations in human beings such as tongue rolling, finger prints, students? heights, etc.
Discussion on the concept of variation.

Ink pad, hand lenses, white paper.

KLB BK IV.
PP 1-2.

GENETICS

Discontinuous variation.
Continuous variation.

By the end of the lesson, the learner should be able to:
Define discontinuous variation.
Define continuous variation.
Give examples of characteristics that show continuous variation.

Observe some discontinuous variations in human beings such as tongue rolling, sex, blood groups, etc.
Discussion on the concept of discontinuous variation.


Class activity ; students measure and record their heights;
Plotting of frequency-height graph;
Analyzing the graph;
Discussion with probing questions.

text book
Metre rules/ tape measure,
Graph papers

KLB BK IV.
P 3.

KLB BK IV.
PP 3-4

GENETICS

Causes of variation.

By the end of the lesson, the learner should be able to:
Discuss causes of variation.

Exposition of new concepts.
Discussion with probing questions.

text book

KLB BK IV.
P 4

GENETICS

Causes of variation.

By the end of the lesson, the learner should be able to:
Discuss causes of variation.

Exposition of new concepts.
Discussion with probing questions.

text book

KLB BK IV.
P 4

GENETICS

The chromosome.

By the end of the lesson, the learner should be able to:
Describe the structure of chromosomes.

Exposition of new concepts.
Probing questions.
Discussion.

text book

KLB BK IV. PP 4-5.

GENETICS

Chromosomal behaviour during mitosis.
Chromosomal behaviour during meiosis.

By the end of the lesson, the learner should be able to:
Describe chromosomal behaviour during mitosis.
Describe chromosomal behaviour during meiosis.

Exposition;
Teacher demonstrations;
Drawing diagrams;
Detailed discussion.

Scissors,
Manilla papers, thread, cellotape.
Scissors,
Manilla papers, threads, cellotape.

KLB BK IV. PP 5-6
KLB BK IV. PP 6-7

GENETICS

Genes and DNA.

By the end of the lesson, the learner should be able to:
Describe the structure of genes and DNA.
Identify the role of DNA.

Expository approach.

Chart- the double helix DNA.

KLB BK IV. PP 7-8

GENETICS

DNA replication.

By the end of the lesson, the learner should be able to:
Describe DNA replication.
Explain the role of DNA in protein synthesis.

Exposition;
Drawing mRNA strands.

text book

KLB BK IV. PP 9-10

GENETICS

First law of heredity.

By the end of the lesson, the learner should be able to:
Describe Mendel?s experiments.
State Mendel?s first law.

Exposition with explanations.

KLB BK IV. PP 11-12

GENETICS

Monohybrid inheritance.
Genetic crosses using a punnet square.

By the end of the lesson, the learner should be able to:
Define monohybrid inheritance.
Differentiate between genotype and phenotype.
Draw diagrams to show genetic crosses.
Show fusion of gametes using a punnet square.

Q/A to review Mendel?s first law.
Drawing diagrams to show genetic crosses.
Discussion with probing questions.

Completing a punnet square;
Brief discussion.

text book

KLB BK IV. PP 12-14
KLB BK IV. PP 14-15

GENETICS

Genetic crosses using a punnet square.

By the end of the lesson, the learner should be able to:
Show fusion of gametes using a punnet square.

Completing a punnet square;
Brief discussion.

text book

KLB BK IV. PP 14-15

GENETICS

Ratios of phenotypes and genotypes.

By the end of the lesson, the learner should be able to:
Explain the concept of probability in inheritance of characteristics.

Q/A to review phenotypes and genotypes.
Simple experiments on probability.
Discussion.

Beans of two different colours, beakers.

KLB BK IV. PP 15-17

GENETICS

Incomplete dominance.

By the end of the lesson, the learner should be able to:
Cite examples of incomplete dominance.
Illustrate incomplete dominance with diagrams.

Exposition;
Discussion;
Drawing diagrams.

chart

KLB BK IV. PP 19-20.

GENETICS

Inheritance of ABO blood groups.
Inheritance of Rhesus factor.

By the end of the lesson, the learner should be able to:
Illustrate inheritance of blood groups with diagrams.

Describe inheritance of Rhesus factor.

Exposition;
Discussion;
Drawing diagrams;
Supervised practice on inheritance of blood groups.
Exposition;
Discussion.

chart

KLB BK IV. PP 20-21
KLB BK IV. PP 21-22

GENETICS

Determining unknown genotypes.

By the end of the lesson, the learner should be able to:
Determine unknown genotypes using test crosses and selfing crosses.

Exposition;
Probing questions;
Drawing illustrative diagrams;
Discussion.

text book

KLB BK IV. PP 22-23

GENETICS

Sex determination in man.

By the end of the lesson, the learner should be able to:
Describe sex determination in man.

Exposition;
Drawing illustrative diagrams;
Discussion.

KLB BK IV. PP 23-24

GENETICS

Sex-linked genes and traits.

By the end of the lesson, the learner should be able to:
Identify sex-linked traits in man.
Illustrate inheritance of sex-linked traits with diagrams.

Probing questions;
Drawing illustrative diagrams;
Discussion.

text book

KLB BK IV. PP 24-27

GENETICS

Non-disjunction.

By the end of the lesson, the learner should be able to:
Explain effects of non-disjunction as a chromosomal abnormality.

Exposition of new concepts;
Discussion.

text book

KLB BK IV. PP 30-33

GENETICS

Gene mutation.

By the end of the lesson, the learner should be able to:
Differentiate between chromosomal and gene mutation.
Identify types of gene mutation.

Q/A to review types of chromosomal mutation;
Using sequence models to show chromosomal mutations.
Discussion.

Models to show Chromosomal mutations.

KLB BK IV. PP 33-35

GENETICS

Disorders due to gene mutations.

By the end of the lesson, the learner should be able to:
Illustrate genetic disorders with diagrams.

Discussion on albinism, sickle-cell anaemia, haemophilia, colour blindness.
Drawing illustrative diagrams.

chart

KLB BK IV. PP 35-38

GENETICS

Applications of genetics.

By the end of the lesson, the learner should be able to:
Identify areas of practical application of genetics.

Probing questions;
Open discussion;
Topic review.

text book,video

KLB BK IV. PP 39-45

EVOLUTION

Meaning of evolution. Theories of origin of life.
Evidence for organic evolution.

By the end of the lesson, the learner should be able to:


Define evolution.
Explain the theories of life.
Cite evidence for organic evolution.

Brain storming;
Probing questions;
Q/A on creation theory;
Exposition of chemical theory.

Brain storming;
Probing questions;
Exposition;
Discussion.

text book

KLB BK IV. PP 49-51
KLB BK IV. PP 51-59

EVOLUTION

Evidence for organic evolution.

By the end of the lesson, the learner should be able to:
Cite evidence for organic evolution.

Brain storming;
Probing questions;
Exposition;
Discussion.

text book

KLB BK IV. PP 51-59

EVOLUTION

Comparative anatomy and homologous structures.

By the end of the lesson, the learner should be able to:
Define divergent evolution.
Give examples of homologous structures.

Examine forelimbs of vertebrates;
Discuss adaptations and use of the limbs.

Forelimbs of vertebrates.

KLB BK IV. PP 59-63

EVOLUTION

Comparative anatomy and homologous structures. (contd)

By the end of the lesson, the learner should be able to:
Define divergent evolution.
Give examples of homologous structures.

Examine forelimbs of vertebrates;
Discuss adaptations and use of the limbs.

Forelimbs of vertebrates.

KLB BK IV. PP 59-63

EVOLUTION

Convergent evolution and analogous structures.
Convergent evolution and analogous structures.(contd)

By the end of the lesson, the learner should be able to:
Define convergent evolution.
Give examples of analogous structures.
Give examples of vestigial structures.

Examine wings of insects; wings of birds / bat.
Discuss observations.

Wings of insects, wings of birds / bat.

KLB BK IV. PP 63-64

EVOLUTION

Larmack?s theory of evolution.
Darwin?s theory of natural selection.

By the end of the lesson, the learner should be able to:
Explain Larmack?s theory of evolution.
Explain Darwin?s theory of natural selection.
Cite examples of natural selection in action.

Expositions and explanations.
Expositions and explanations;
Probing questions;
Topic review.

text book

KLB BK IV. P 67

RECEPTION, RESPONSE & CO-ORDINATION

Meaning of stimulus, response and irritability. Tactic responses.

By the end of the lesson, the learner should be able to:




Define of stimulus, response and irritability.
Explain the need for sensitivity and response.
Identify types of tactics responses.

Brain storming;
Exposition;
Group experiments-chemotaxis in termites;
Discussion.

Brad crumbs, termites, dry sand, moth balls.

KLB BK IV. PP 73-74

RECEPTION, RESPONSE & CO-ORDINATION

Tropism and types of tropism.

By the end of the lesson, the learner should be able to:
Identify types of tropism.
State differences between tropisms and taxes.

Examine previous plant set ?ups on response to light, gravity;
Probing questions and discussion.

Seedlings, klinostat, corked beaker.

KLB BK IV. PP 74-78

RECEPTION, RESPONSE & CO-ORDINATION

Tropism and types of tropism.
Nastic responses.

By the end of the lesson, the learner should be able to:
Identify types of tropism.
State differences between tropisms and taxes.
Identify types of nastic responses

Examine previous plant set ?ups on response to light, gravity;
Probing questions and discussion.
Q/A and discussion.

Seedlings, klinostat, corked beaker.
text book

KLB BK IV. PP 74-78
KLB BK IV. PP 78-80

RECEPTION, RESPONSE & CO-ORDINATION

Role of auxins in tropisms.

By the end of the lesson, the learner should be able to:
Explain the role of auxins in tropisms.

Examine previous plant set ?ups on response to light, gravity; contact;
Probing questions and discussion.

text book

KLB BK IV. PP 80-83

RECEPTION, RESPONSE & CO-ORDINATION

Response and Co-ordination in animals. The nervous system.

By the end of the lesson, the learner should be able to:




State components of the nervous system.
Describe the structure of nerve cells.

Descriptive and expository approaches.

Illustrative diagrams.

KLB BK IV. PP 84-85

RECEPTION, RESPONSE & CO-ORDINATION

Types of neurons. The brain.

By the end of the lesson, the learner should be able to:
Identify types of neurons.

Describe structure of the human brain.

Descriptive and expository approaches.

Illustrative diagrams.

KLB BK IV. PP 85-88

RECEPTION, RESPONSE & CO-ORDINATION

Reflex actions.
Transmission of a nerve impulse.

By the end of the lesson, the learner should be able to:
Differentiate between simple and conditioned reflex actions.
Describe the transmission of a nerve impulse.

Illustrate a simple reflex arc.
Probing questions on differences between simple and conditioned reflex actions.
Descriptive and expository approaches.

Illustrative diagrams.

KLB BK IV. PP 88-90
KLB BK IV. PP 90-93

RECEPTION, RESPONSE & CO-ORDINATION

The endocrine system.

By the end of the lesson, the learner should be able to:
Identify components of endocrine system.
Compare endocrine system. With nervous system.

Discussion; tabulate the differences.

Illustrative diagrams.

KLB BK IV. PP 93-6

RECEPTION, RESPONSE & CO-ORDINATION

The mammalian eye.

By the end of the lesson, the learner should be able to:
Identify major parts of the human eye.
Explain image formation and interpretation in the eye.

Brain storming;
Discussion with probing questions.

Chart- the human eye.

KLB BK IV. PP 93-100

RECEPTION, RESPONSE & CO-ORDINATION

Accommodation of the eye.

By the end of the lesson, the learner should be able to:
Explain the role of ciliary muscles in accommodation of the eye.

Discussion with probing questions,
Drawing illustrative diagrams.

Chart- focusing far and near points.

KLB BK IV. PP 100-1

RECEPTION, RESPONSE & CO-ORDINATION

Defects of vision and their correction.
The human ear.

By the end of the lesson, the learner should be able to:
Identify defects of vision.
Explain correction of vision defects.
Identify major parts of the human ear.

Detailed discussion with probing questions;
Drawing illustrative diagrams.

Descriptive and expository approaches.
Drawn diagrams.

Illustrative diagrams.

KLB BK IV. PP 101-4
KLB BK IV. PP 104-5

RECEPTION, RESPONSE & CO-ORDINATION

Hearing.
Body balance and posture.

By the end of the lesson, the learner should be able to:
Explain how the ear perceives sound.
Explain how the ear maintains body balance and posture.

Descriptive and expository approaches.

Illustrative diagrams.

KLB BK IV. P 106

RECEPTION, RESPONSE & CO-ORDINATION

Defects of the ear.

By the end of the lesson, the learner should be able to:
Identify some defects of the ear.

Descriptive and expository approaches.

text book

KLB BK IV.
P 108