NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
In what phase of meiosis does the following occur?Chromosomes are segregated at opposite poles, one group on each side of the cell. Each chromosome consists of two chromatids. (sister chromatids) Cytokinesis begins, forming two daughter cells.
A
Prophase I
B
Anaphase I
C
Metaphase I
D
Telophase I
E
Prophase II
Explanation: 

Detailed explanation-1: -The mitotic phase is a multistep process during which the duplicated chromosomes are aligned, separated, and moved to opposite poles of the cell, and then the cell is divided into two new identical daughter cells.

Detailed explanation-2: -Telophase is the fifth and final phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. Telophase begins once the replicated, paired chromosomes have been separated and pulled to opposite sides, or poles, of the cell.

Detailed explanation-3: -Anaphase II: During anaphase II, the centromere splits, freeing the sister chromatids from each other. At this point, spindle fibers begin to shorten, pulling the newly-separated sister chromatids towards opposite ends of the cell.

Detailed explanation-4: -During anaphase I, the homologous chromosome pairs separate and are pulled to opposite poles of the cell by spindle fibers attached to the centrioles. This first cell division process is completed during telophase I. Separate nuclear membranes form.

Detailed explanation-5: -Chromosome segregation occurs at two separate stages during meiosis called anaphase I and anaphase II (see meiosis diagram).

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