Module: Inheritance and Variation of Traits
DCI: LS3.A (A) Inheritance of Traits – Many characteristics of
organisms are inherited from their parents.
DCI: LS3.B (A) Variation of Traits – Different organisms vary in
how they look and function because they have different inherited information.
PE: 3-LS3-1 Analyze and interpret data to provide evidence that
plants and animals have traits inherited from parents and that variation of
these traits exists in a group of similar organisms.
[Clarification
Statement: Patterns are the similarities and differences in traits shared
between offspring and their parents, or among siblings. Emphasis is on
organisms other than humans.] [Assessment Boundary: Assessment does not include
genetic mechanisms of inheritance and prediction of traits. Assessment is
limited to non-human examples.]
Ideas we see in this standard:
- Organisms inherit many of their characteristics from their parents.
- Organisms that vary in look and function are different because they inherited different information.
It is important to note that this is NOT a standard where we are comparing inherited and learned characteristics. Instead, we can compare like organisms and and different organisms. When comparing like organisms, it is because the information they inherited was similar, but if they are different, the information they inherited was different.
Possible Question Starters:
We might be able to get away with something similar to this:
This is an adult strawberry plant. Which of the seedlings is most likely the offspring of this plant?
The characteristics of three offspring are compared in the table.
Characteristics
|
Offspring 1
|
Offspring 2
|
Offspring 3
|
Color
|
Gray
|
Green
|
White
|
Texture
|
Rough
|
Smooth
|
Furry
|
Ears
|
Large, floppy
|
Small, openings
|
Long, floppy
|
Why do the characteristics of these three offspring vary so much?
correct answer - the offspring have different parents
incorrect answer - the offspring were born in different areas
No comments:
Post a Comment