Student Exploration: Inheritance
Vocabulary: acquired trait, asexual reproduction, clone, codominant traits, dominant trait, offspring, recessive trait, sexual reproduction, trait
Prior Knowledge Questions (Do these BEFORE using the Gizmo.)
How are you similar to your parents?
How are you different?
A trait is a characteristic. Think about your physical traits (eye color, skin tone, height, hair, face, allergies, etc.) What traits do you think you inherited, or received, from your parents?
In the Inheritance Gizmo™ you can create and breed aliens on an imaginary planet. Select Asexual reproduction. During asexual reproduction, a single parent produces offspring (children).
Drag the parent over to the Parent 1 space and press Reproduce. Fill in the Offspring traits on the table above. What traits appear to be inherited from the parent?
Because this offspring inherits its traits from one parent, it is called a clone.
Get the Gizmo ready:
Question: Are all parental traits inherited by offspring?
Observe: In sexual reproduction, two parents pass traits to the offspring. Create and breed a variety of aliens. Record your observations on a separate sheet of paper.
Form a hypothesis: Which traits do you think are passed down from alien parents to their offspring, and which traits are not? Explain.
Experiment: Set the Food supply to 2 bushes. Create two identical parents with thick bodies, green skin, curly antennas, and triangle tattoos. Make two offspring and record their traits in the table below.
Analyze: Compare the offspring traits to the parent traits.
Which traits were passed from parents to offspring?
Which traits were not passed down?
Investigate further: Create offspring with a few different levels of Food supply. How does food supply affect the body type of offspring?
Think and discuss: Suppose a human child had a mother with dyed-pink hair and a father who was missing a finger (lost in an accident). Would the child inherit these traits? Explain.