If a cell had 12 chromosomes, how many chromosomes will each daughter cells have after mitosis and cytokinesis

12 chromosomes in each cell.

Explanation:

Mitosis is a form of cellular division that produces two identical daughter cells, each having the same number of chromosomes as the parent cell.

This happens because a cell replicates it's chromosomes before dividing (this occurs in interphase), creating two sister chromatids. These chromatids then get separated in anaphase, producing two daughter cells, each with the same number of chromosomes as the parent cell.

I've attached an image which should hopefully explain how this happens. :)

the answer is true when observing or determining population size, a direct observation is use, in which each organism is counted in a population or in an area. one benefit of this measure is that you get the exact population count but it will take a long time to  determine  the  size  of a  population.