NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The shortest stage of mitosis. Begins with the two sister chromatids of each pair suddenly part. Each chromatid thus becomes a chromosome. What phase is this?
A
Telophase
B
Anaphase
C
Prophase
D
Metaphase
Explanation: 

Detailed explanation-1: -In anaphase, the shortest stage of mitosis, the sister chromatids break apart, and the chromosomes begin moving to opposite ends of the cell. By the end of anaphase, the 2 halves of the cell have an equivalent collection of chromosomes.

Detailed explanation-2: -The kinetochore microtubules shorten as the chromatids are pulled toward opposite poles, while the polar microtubules subsequently elongate to assist in the separation. Anaphase typically is a rapid process that lasts only a few minutes, making it the shortest stage in mitosis.

Detailed explanation-3: -In anaphase II, the sister chromatids separate and are pulled towards opposite poles of the cell.

Detailed explanation-4: -With meiosis, two rounds of anaphase occur. During anaphase 1, homologous chromosomes separate and move to opposite ends of the cell. With anaphase 2, the sister chromatids separate in much the same manner as mitotic anaphase.

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