AP BIOLOGY

Detailed explanation-1: -If an organism has 20 chromosomes, then the number of chromosomes the daughter cells have after mitosis is 20 because when a cell divides by the process of mitosis it produces two clone daughter cells having the same number of chromosomes (20) as the parent cell has.

Detailed explanation-2: -If the cells have 12 chromosomes during interphase, the number of chromosomes will be retained as 12 in each of the daughter cells even after the completion of mitosis.

Detailed explanation-3: -Each daughter cell will have half of the original 46 chromosomes, or 23 chromosomes. Each chromosome consists of 2 sister chromatids.

Detailed explanation-4: -The daughter cell after meiosis is referred to as haploid (1n), meaning it contains only one copy of each chromosome. In this case, if the parent cell contained 20 chromosomes, the produced daughter cells would each contain half that amount, or 10 chromosomes each.

Detailed explanation-5: -So the correct option is ‘ Eighteen’.