Acontrolled experiment tests the effects of two variables true or false

False

Explanation:

A controlled experiment is an experiment that allows us to the test the effect of a single variable.

In a controlled experiment, just one of the factors is affected.

Controlled experiments are only carried out under very strict and controlled conditions.

In controlled experiment we have the experimental and control groups. We also have the Dependent and Independent variable in a control group.

c

explanation:

this is true, assuming that the allele is completely recessive and incomplete dominance is not a factor.