The open lab
A little experiment.
A real discovery.
No login. No score to keep. Just choose a question and see what you can figure out.
What could two alleles make?
In this simple model, A is dominant. An Aa × Aa cross has four equally likely combinations.
Tap each square to reveal its genotype.
Predict first: how many squares will be aa?
A breath is more than a number.
With a fixed dead space of 150 mL, how much fresh air reaches the gas-exchanging region each minute?
(500 − 150) × 12 ÷ 1,000 = 4.2 L/min
An illustrative physiology model, not a health assessment.
Which group had the higher risk?
At a fictional picnic, 8 of 20 people who ate a dish became ill. Among 40 who did not eat it, 4 became ill.
What is the risk ratio?
Compare the proportions, not just the numbers of people.
These short demonstrations introduce concepts from the full lessons. Sources: OpenStax Biology 2e §12.3; Anatomy & Physiology 2e §22.3; CDC Principles of Epidemiology, Lesson 3.