Category: Health Care and Life Sciences : Health Care and Life Sciences

Which of the following happens LAST during mitosis?
Microtubules emerge from the centrosomes
Tetrads form
The sister chromatids separate
Sister chromatids align on the metaphase plate
The spindles start to pull on the kinetochores of sister chromatids.
Discuss in 1page
THE ANSWER
The correct answer is The sister chromatids separate.
Here is a brief overview of the stages of mitosis:
Prophase: The chromosomes condense and the nuclear envelope breaks down. The centrosomes, which are the microtubule organizing centers, start to move apart.
Metaphase: The chromosomes line up along the equator of the cell. The spindle microtubules attach to the kinetochores, which are protein structures located on the centromeres of the chromosomes.
Anaphase: The sister chromatids separate and are pulled towards opposite poles of the cell by the spindle microtubules.
Telophase: The chromosomes arrive at the poles of the cell. The nuclear envelope reforms and the nucleolus reappears.
Cytokinesis: The cell divides into two daughter cells.
So, the last event that happens during mitosis is the separation of the sister chromatids. This happens in anaphase, when the spindle microtubules pull the sister chromatids apart.
Here is a more detailed explanation of the events that happen during mitosis:
Microtubules emerge from the centrosomes
The centrosomes are the microtubule organizing centers. They are located near the nucleus in the cytoplasm. During prophase, the centrosomes start to move apart, and microtubules begin to grow out from them.
Tetrads form
During prophase, the chromosomes condense and the nuclear envelope breaks down. The chromosomes then pair up to form tetrads. Each tetrad consists of two sister chromatids.
The spindles start to pull on the kinetochores of sister chromatids
In metaphase, the chromosomes line up along the equator of the cell. The spindle microtubules attach to the kinetochores, which are protein structures located on the centromeres of the chromosomes.
The sister chromatids separate
In anaphase, the sister chromatids separate and are pulled towards opposite poles of the cell by the spindle microtubules.
The chromosomes arrive at the poles of the cell
In telophase, the chromosomes arrive at the poles of the cell. The nuclear envelope reforms and the nucleolus reappears.
The cell divides into two daughter cells
In cytokinesis, the cell divides into two daughter cells. This process usually involves the formation of a cleavage furrow, which is a groove that forms in the middle of the cell.