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Meiosis
Concept 10: Meiosis II: Prophase II
   Practice (1 page)
Concept 11: Meiosis II: Metaphase II
   Practice (1 page)
Concept 12: Meiosis II: Anaphase II
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Concept 13: Meiosis II: Telophase II
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Concept 10: Meiosis II: Prophase II
Meiosis II begins without any further replication of the chromosomes. In prophase II, the nuclear envelope breaks down and the spindle apparatus forms.
To replay the prophase II animation, click here.
Replay

• While chromosome duplication took place prior to meiosis I, no new chromosome replication occurs before meiosis 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.