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M EIOSIS · Part 3

Chapter 10: CELL CYCLE AND CELL DIVISION · BIOLOGY

. . Meiosis II Prophase II: Meiosis II is initiated immediately after cytokinesis, usually before the chromosomes have fully elongated. In contrast to meiosis I, meiosis II resembles a normal mitosis.

The nuclear membrane disappears by the end of prophase II (Figure . ). The chromosomes again become compact. Metaphase II : At this stage the chromosomes align at the equator and the microtubules from opposite poles of the spindle get attached to the kinetochores (Figure .

) of sister chromatids. Anaphase II: It begins with the simultaneous splitting of the centromere of each chromosome (which was holding the sister chromatids together), allowing them to move toward opposite poles of the cell (Figure . ) by shortening of microtubules attached to kinetochores. Figure .

Stages of Meiosis I Telophase II: Meiosis ends with telophase II, in which the two groups of chromosomes once again get enclosed by a nuclear envelope; cytokinesis follows resulting in the formation of tetrad of cells i.e., four haploid daughter cells (Figure . ).

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