Meiosis II Stages
Prophase II: *The centrioles duplicate. This occurs by separation of the two members of the pair, and then the formation of a daughter centriole perpendicular to each original centriole.
*The two pairs of centrioles separate into two centrosomes. *The nuclear envelope breaks down, and the spindle apparatus forms. |
Metaphase II: *Each of the daughter cells completes the formation of a spindle apparatus.
*Single chromosomes align on the metaphase plate, much as chromosomes do in mitosis. This is in contrast to metaphase I, in which homologous pairs of chromosomes align on the metaphase plate. *For each chromosome, the kinetochores of the sister chromatids face the opposite poles, and each is attached to a kinetochore microtubule coming from that pole. |
Telophase II: *A nuclear envelope forms around each set of chromosomes.
*Cytokinesis takes place, producing four daughter cells (gametes, in animals), each with a haploid set of chromosomes. *Because of crossing-over, some chromosomes are seen to have recombined segments of the original parental chromosomes. |