Which of the following clusters of terms applies when addressing enhancers as elements associated with eukaryotic genetic regulation? explain your answer.

a. cis-acting, variable orientation, variable position
b. trans-acting, fixed position, fixed orientation
c. cis-acting, fixed position, fixed orientation
d. cis-acting, variable position, fixed orientation
e. trans- and cis-acting, variable position

a unit of heredity that is transferred from a parent to offspring and is held to determine some characteristic of the offspring.

the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation:

the answer is d. none of the above