Which of the following must have been held constant in order for the results of the testing process to be considered valid?

a.) the length of time it took the material samples to reach 180 k
b.) the shape and size of the material samples
c.) the electrical conductivity of the material samples
d.) the temperature of the material samples

In sweet pea, gene c is responsible for color production and gene p is responsible for the purple color pigment. both of them are located on two different loci on different chromosomes. the flowers will be purple only when the plant has the genotypes as c_p_. no color will be produced with genotypes: ccpp, ccpp, ccpp, ccpp. thus, gene c controls the expression of gene p. what pattern of inheritance is exhibited here? a. pleiotropy b. epistasis c. multiple alleles