The independent (or manipulated)variable is something that the experimenter purposely changes or varies over the course of the investigation. The dependent (orresponding) variable is the one that is observed and likely changes in response to the independentvariable.
Answer from: Quest
He used pea plants to study the patterns of heredity.
What is required in the genotype of an individual to show a recessive trait? a. two recessive alleles b. at least one recessive allele c. no recessive alleles