MARSH BEETLES · SELECTION LAB

Which pattern blends in?

Test how inherited patterns can become more or less common when a marsh habitat changes.

1. PREDICT

How does background affect which inherited pattern becomes common?

2. INVESTIGATE

Marsh habitat

Generation 0

Pale speckled beetle Dark grey speckled beetle

CHANGE ONE THING

Experiment controls

Substrate background

Predation pressure

Trial seed

WHAT HAPPENED?

Generation evidence

Total
48
Pale
24
Dark
24

POPULATION OVER TIME

Inherited-pattern proportion

Graph line styles

CHECK THE NUMBERS

Run record

3. EXPLAIN

4. CHECK YOUR THINKING

Check your thinking