Question

why should we duplicate the chromosomes before mitosis? so each new daughter cell has 1/2 the number of chromosomes as the parent cell so each new daughter cell has the exact number of chromosomes as the parent cell to save time so we dont have to do it later

Explanation:

Mitosis is a process of cell - division that results in two daughter cells identical to the parent cell. Chromosome duplication before mitosis ensures that each daughter cell receives the same genetic material as the parent cell. The first option is incorrect as daughter cells in mitosis have the same number of chromosomes as the parent, not half. The third option about saving time is not the main biological reason for chromosome duplication.

Answer:

So each new daughter cell has the exact number of chromosomes as the parent cell