Download Inheritance

Basic Lesson Plan
Date: November 26, 2007
Course & Grade level: Animal Science, 10th-12th grade
Area: Animal Science
Unit: Reproduction
Job: Learning how traits are inherited
Reference:
Instructional Goal: For students to understand the difference between dominant and
recessive genes as well as how are traits are inherited.
Standards:
SCI3.3.6 - describing the pattern and process of reproduction and development in several
organisms
AGS11/12.03.19 - Estimate genetic change.
SCI3.4.2 - giving examples to show how some traits can be inherited while others are due
to the interaction of genes and the environment
Objectives:
1. The student will explain how traits are inherited.
2. The student will compare dominant and recessive genes.
3. The student will analyze the function of dominant and recessive traits.
Introduction:
Have the students share what they inherited from their parents. i.e. body type, eye color,
hair color, personality
Motivation:
Say, “Now that we have discussed what you have inherited from your parents, lets learn
how traits are inherited.”
Lesson Body:
1. Inheritance: Explain how inherited traits (color, size, growth rate, horned or
polled and carcass traits) are controlled by genes.
a. Color: controlled by one pair of genes
b. Growth rate: controlled by only a few pair of genes
c. Carcass traits: controlled by many pairs of genes
d. Feed efficiency: controlled by many pairs of genes
2. Dominant and Recessive Genes: Define dominant and recessive genes. Explain
how gene pairs are written. i.e. dominant is capital, recessive is lower-case. Go
through a few examples.
3. Incomplete dominance: Explain that incomplete dominance occurs when neither
gene is totally dominant over the other. The result is a mixture of the two traits.
Closure:
Dickens E-Moment: Have the students write a story using dominant genes, recessive
genes and incomplete dominance as characters.
Assessment/Student Evaluation:
Unit test, Dickens moment
Materials Needed:
Example Dickens story
Student Reminders/Announcements
Dickens Moment (Dominant and recessive genes)
One day in the ag room, the two brothers Dominant and Recessive
Gene walked in. They were arguing with each other as usual. Recessive
was upset with Dominant because he is the one that is always noticed.
Recessive is tired of living in Dominant’s shadow. Miss McComb breaks up
the fight by sitting Dominant and Recessive down. She sits with them and
ponders the situation. Together they come up with an idea to make both
Dominant and Recessive happy and bring harmony back to the ag room.
Miss McComb explains how they can mix each others traits to make an
incomplete dominance. Now both Dominant and Recessive Gene can shine
without being totally dominant over each other. Peace is once again restored
to the ag room due to incomplete dominance!!!!!!!