Lesson 73 of 84 · Heredity
Experiment⭐ 30 XPHomologous Structures: Evidence for Evolution (Part 4)
Homologous Structures: Evidence for Evolution (Part 4).
🎯 Your mission
Run the experiment. Find out what really happens.
⚡ The twist
Nature loves to surprise the careful watcher.
Mind = Blown
🔬 The more you look, the more nature shows you.
Make a hypothesis first
Before you start: write down what you think will happen, and why.
What You'll Learn
Homologous structures are similar body parts in different species that suggest a common ancestor. The arm bones of humans, whales, bats, and dogs share the same basic structure.
Key Words
- adaptation
- fossil record
- species
Materials Needed
- slides
- onion skin
- iodine stain
- paper
- colored pencils
Safety First
- Dispose of materials properly after the experiment.
- Handle glass items carefully to avoid breakage.
- Do not mix unknown chemicals together.
Steps
Read about Heredity and write down three key facts.
Research one genetic disorder. Create an infographic showing its cause, symptoms, and how it is inherited.
Watch carefully for any changes and note the time.
Create a data table to organize your measurements.
Check Your Understanding
Question 1
1 of 3What are homologous structures?
Where you see this in real life
This shows up in your everyday life more than you'd think.
Stretch Challenge
Try this in real life this week.
Try one experiment in real life this week — even a tiny one.
For the dinner table
“What's the most surprising thing you learned today?”
Next Smart Experiment
We'll pick an experiment that matches exactly how you're thinking right now.
Share this experiment
Send it to a parent who's looking for a 10-minute kitchen science win.
Checkout complete lesson on Heredity for 6th Grade
Get the full Heredity track as a printable PDF — all lessons, worksheets, and answer keys.