Asked Dec 18, 2019

Prophase is the stage of mitosis characterized by the

a. physical seperation of sister chromatids

b. appearance of visible chromosomes

c. occurrence of cytokinesis

d. alignment of chromosomes at center of cell


Expert Answer

Step 1

Mitosis is the process of asexual reproduction by which the cell divides into two and produces a replica with an equal number of chromosomes in each of the resulting diploid cell. Two diploid cells that are identical to the parent cell are produced as a result of mitosis. When one eukaryotic cell is divided to form two cells, the chromosome number is preserved in the process of mitosis.

Step 2

Option b. is correct.

Answer: Prophase is the stage of mitosis characterized by the appearance of visible chromosomes.

Reasons for the correct answer:

Prophase is the stage of cell division after the interphase. In the prophase stage of mitosis, the DNA gets coiled and becomes compacted, nuclear membrane disappears, and mitotic spindles start forming. At this stage, the chromosome becomes visible, compact and thickened because the two chromatids are joined at the centromere.

Reasons for the incorrect answers:

Option a. is incorrect. The physical separation of sister chromatids by the spindle fibers to the opposite poles of the cell occurs during the anaphase of mitosis.

Option c....

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