A) Identify a signaling molecule from the model presented. Explain how receptors play a role in cell differentiation.

B) Identify the dependent variable and two controls the experimenters used when conducting this

experiment.

C) Evaluate if the number of Variant 1-Type cells with mating projections was significantly different

from those of the Wild Type. Use chi-square analysis.

D) Scientists propose that a mutation has occurred that either changed the mating pheromone or

receptor site on the Variant 1-Type yeast cells. Predict where the mutation occurred. Justify

your prediction with evidence from the experiment and scientific reasoning, based on your

knowledge of cell-signaling pathways.