Oklahoma Science 8.LS4.5

Science8th GradeBiological Unity and Diversity

The Standard

Gather and synthesize information about the practices that have changed the way humans influence the inheritance of desired traits in organisms.

Oklahoma Academic Standards for Science (2026)

Teacher's field guide

What Students Need to Do: Students gather information from two sources on selective breeding and gene editing. They combine what they find to explain how people can influence traits passed to offspring.
What Mastery Looks Like: A student compares choosing disease-resistant tomato parents with editing DNA in cells used to grow tomato plants. They explain how each could produce offspring with the trait and cite evidence from both sources.
Common Misconceptions: Students may think selective breeding changes a plant during its lifetime, rather than affecting its offspring. They may also think every offspring gets the chosen trait, or that editing any body cell makes a change inheritable.
How to Assess It: Give two source cards: 'A farmer saves seeds from disease-resistant tomato plants' and 'A lab edits a disease-resistance gene in cells used to grow tomato plants.' Ask, 'How might each practice lead to disease-resistant offspring? Use a detail from each card.'

Lesson moves

Give groups paper tomato plant cards showing parent traits and possible offspring; have them choose parents for sweeter fruit and record likely outcomes.
Ask students to write how choosing sweet-fruited tomato parents differs from editing DNA in cells used to grow a new tomato plant.
Sort scenario cards into selective breeding, gene editing, and not inherited: choosing disease-resistant wheat parents, editing wheat DNA, and watering wheat.
Show a disease-resistant tomato seed packet and ask how growers could produce seeds that pass on that trait.

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