3. Patterns of Inheritance
CONTENT
The learners learn that Inherited traits passed from
parents to offspring are governed by the rules on the
patterns of inheritance.
LEARNING
STANDARD
1. Describe simple patterns of inheritance in organisms.
2. Represent patterns of inheritance of a simple
dominant/ recessive characteristic through generations
of a family.
LEARNING
COMPETENCY
4. By the end of the lesson, the 80 percent of the learners
will be able to:
1. Identify the terms related to the genetics.
2. Perform the activity called Who do you look like?” and Let
students give their answers and reasons for their responses.
3. Appreciate the significance of heredity in shaping an
individual's physical and psychological characteristics by
answering the guide questions.
OBJECTIVES
5. I. Activating Prior Knowledge
Short Review
Facilitate a simple review game about the plant transport system. Let students write
their own questions and answers on a small piece of paper.
I. Activating Prior Knowledge
(Day- 1)
What tissue in the
roots absorbs water
and minerals?
Root hair
6. I. Activating Prior Knowledge
Short Review
Facilitate a simple review game about the plant transport system. Let students write
their own questions and answers on a small piece of paper.
I. Activating Prior Knowledge
(Day- 1)
What process pulls
water
up the xylem?
Transpiration
7. I. Activating Prior Knowledge
Short Review
Facilitate a simple review game about the plant transport system. Let students write
their own questions and answers on a small piece of paper.
I. Activating Prior Knowledge
(Day- 1)
What sugar does
photosynthesis
produce?
Glucose
8. I. Activating Prior Knowledge
Short Review
Facilitate a simple review game about the plant transport system. Let students write
their own questions and answers on a small piece of paper.
I. Activating Prior Knowledge
(Day- 1)
What carries food
(sugar)
throughout the
plant?
Phloem
9. I. Activating Prior Knowledge
Short Review
Facilitate a simple review game about the plant transport system. Let students write
their own questions and answers on a small piece of paper.
I. Activating Prior Knowledge
(Day- 1)
What are the tiny
tubes in
xylem called?
Tracheids
10. B. Establishing Purpose of the Lesson
Post the question “Who do you look like?” on
the board. Let students give their answers
and reasons for their responses.
1. LESSON PURPOSE
11. B. Establishing Purpose of the Lesson
Facilitate a Scavenger Hunt activity to define words that are
associated with heredity.
Hide cards or papers with terms and their definitions around
the classroom or school.
Divide students into teams and provide them with a list of
terms to find.
The teams must search for the cards, match the terms with
their definitions, and return to the starting point within a time
limit.
2. UNLOCKING CONTENT AREA VOCABULARY
12. a. Alleles: different versions of a gene found at the same location (locus) on homologous chromosomes.
b. Chromosomes: thread-like structures made of DNA.
c. Genes: the fundamental units of heredity.
d. Dominant: A genetic trait that is expressed when present, overriding the expression of its recessive allele.
e. Recessive: A genetic trait that is expressed only in the absence of the dominant allele.
f. Genotype: The genetic makeup of an organism, consisting of the alleles it inherits from its parents.
g. Phenotype: The observable traits or characteristics of an organism, resulting from its genotype and
influenced by environmental factors.
h. Pedigree: A diagrammatic representation of a family's genetic history, showing the transmission of traits
across generations.
i. Homozygous: Having two identical alleles for a particular gene (e.g., homozygous dominant or homozygous
recessive).
j. Heterozygous: Having two different alleles for a particular gene (e.g., one dominant and one recessive allele).
k. Mendelian Inheritance: The principles of inheritance discovered by Gregor Mendel, including the law of
dominance, law of segregation and the law of independent assortment.
l. Punnett Square: A diagram used to predict the possible genotype combinations of offspring from a genetic
cross between two parents.
m. Genotypic Ratio: The ratio of different genotypes produced by a genetic cross, representing the
probability of each genotype occurring among the offspring.
n. Phenotypic Ratio: The ratio of different phenotypes produced by a genetic cross, representing the
probability of each phenotype occurring among the offspring.
o. Monohybrid Cross: A genetic cross involving only one trait.
p. Dihybrid Cross: A genetic cross involving two different traits.
q. Probability: The likelihood or chance of a particular outcome occurring, often expressed as a fraction or
percentage.
13. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
different versions of a gene found at
the same location (locus) on
homologous chromosomes.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
thread-like structures made of DNA.
Alleles
Chromosom
es
14. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
the fundamental units of heredity
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
A genetic trait that is expressed when
present, overriding
the expression of its recessive allele.
Genes
Dominant
15. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
A genetic trait that is expressed only in
the absence of
the dominant allele.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
The genetic makeup of an organism,
consisting of the
alleles it inherits from its parents.
Recessive
Genotype
16. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
The observable traits or
characteristics of an organism,
resulting from its genotype and
influenced by environmental factors.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
A diagrammatic representation of a
family's genetic
history, showing the transmission of
traits across generations.
Phenotype
Pedigree
17. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
Having two identical alleles for a
particular gene (e.g.,
homozygous dominant or homozygous
recessive).
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
Having two different alleles for a
particular gene
(e.g., one dominant and one recessive
allele).
Homozygou
s:
Heterozygo
us:
18. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
The principles of inheritance
discovered by Gregor Mendel,
including the law of dominance, law of
segregation and the law of
independent assortment.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
A diagram used to predict the possible
genotype
combinations of offspring from a
genetic cross between two parents.
Mendelian
Inheritance
Punnett
Square
19. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
The ratio of different genotypes
produced by a genetic cross,
representing the probability of each
genotype occurring among the
offspring.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
The ratio of different phenotypes
produced by a genetic cross,
representing the probability of each
phenotype
occurring among the offspring.
Genotypic
Ratio
Phenotypic
Ratio
20. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
A genetic cross involving only one
trait.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
A genetic cross involving two different
traits.
Monohybri
d Cross
Dihybrid
Cross
21. B. Establishing Purpose of the Lesson
2. UNLOCKING CONTENT AREA VOCABULARY
B. Establishing Purpose of the Lesson
The likelihood or chance of a
particular outcome
occurring, often expressed as a
fraction or percentage.
2. UNLOCKING CONTENT AREA VOCABULARY
Here are some words to identify and unlock:
Probability:
22. B. Establishing Purpose of the Lesson
B. Establishing Purpose of the Lesson
Guide Questions:
1. Which word is familiar to you?
2. Which word do you think is hard to
understand?
3. How are the words related to the lesson on
heredity?
![Reference :
•SCIENCE 8 LESSON EXEMPLAR
● Pedigree ppt. (n.d.). [PowerPoint slides]. Retrieved from
https://www.duplinschools.net/cms/lib/NC01001360/Centricity/
Domain/758/PEDIGREE%20ppt..ppt](https://image.slidesharecdn.com/q1science8week3-day1-250707081226-3b4a57e7/85/Q1_Science-8_Week3-Day-1-pptx-science-lesson-23-320.jpg)