Experiment One

Strain A is spread on each half of a culture plate that contains nutrient media for the bacteria. Bacteria are cultured overnight, allowing the population to double many times and grow to high density.

Do you predict that the bacteria will light up or not? Why?

A divided dish with both sides labeled A, a swab, and a test tube labeled A. — Mutant strain A spread on each half of culture plate

Strain A: Light genes and Signal genes are highlighted, Receptor is dimmed. Signaling molecules move from Signal genes through the cell surface. — Mutant strain A system