This HANDS-ON Punnett squares activity uses simple supplies – just beads and a bag – to model many different Punnett square crosses.
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In this genetics activity, students will:
- READ background information: Before they begin the hands-on part of the activity, students will read a simple introduction to Gregor Mendel and the basics of genetics.
- Do a HANDS-ON activity: Students follow clear, step-by-step directions. There are six sections with a different genetic cross to model for each. Each section has a few analysis questions that go with it. This portion of the activity is done in pairs.
- ANSWER QUESTIONS that pull it all together: Students are provided an explanation of Mendel’s three laws of genetics and state how the activity demonstrated each. This section is presented in a way that can be completed even if you didn’t teach Mendel’s laws specifically!
Supplies Needed:
- Purple beads
- White beads
- Paper bags
Teacher Notes:
- This PDF resource is not editable.
- Answer keys are always included.
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Related Standard:
- MS-LS3-2: Develop and use a model to describe why asexual reproduction results in offspring with identical genetic information and sexual reproduction results in offspring with genetic variation. [Clarification Statement: Emphasis is on using models such as Punnett squares, diagrams, and simulations to describe the cause and effect relationship of gene transmission from parent(s) to offspring and resulting genetic variation.]
