Which of these best describes
incomplete dominance?

Explanation:

When the dominant allele doesy completely cover up the recessive allele and they MIX creating a third phenotype.

Cells only need to grow in size and contents before each cell division so as to avoid getting smaller in size with successive divisions.

Each of the daughter cells produced during mitotic cell division goes through an interphase period. The interphase period is divided into 3:

G1 phase: a period characterized by cell growth. An increase in size and volume of content is achieved in this stage.S phase: a period characterized by the synthesis of DNA. The amount of genetic materials (DNA) doubles up in this stage, whereas, the chromosome number remains constant.G2 phase: a phase in which protein is synthesized. After this stage, the cell is ready to pass through a period of division.

Without going through the stages above, a cell will simply go into a dormant phase which is essentially a resting phase.

More on the cell cycle can be found here: link