AP BIOLOGY

THE MOLECULAR BASIS OF INHERITANCE

DNA MAKES RNA MAKES PROTEIN

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
If a cell has 40 chromosomes, how many chromosomes will each of its daughter cells have after mitosis?
A
40
B
25
C
20
D
12
Explanation: 

Detailed explanation-1: -Answer and Explanation: At the end of this process, a single cell produces two new daughter cells, each having the same amount of genome as present in the parental (initial) cell. Therefore, a cell with 40 chromosomes during the initiation of mitosis will produce daughter cells having 40 chromosomes.

Detailed explanation-2: -At the end of meiosis II, each cell (i.e., gamete) would have half the original number of chromosomes, that is, 15 chromosomes.

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: -When the cell divides, the copies are pulled apart, and each new cell gets one identical copy of each chromosome. This type of cell division is called mitosis, and it produces cells with a total of 46 chromosomes.

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