1. Stages of Meiosis
Chapter 10

2. Prophase I Chromosomes become visible. Nuclear envelope breaks down.
Crossing-over occurs.
Nuclear envelope
Centrioles
Spindle fibers
Centromeres
Chromosomes
Prophase I

3. Pairs of homologous chromosomes move to the equator of the cell
Pairs of homologous chromosomes move to the equator of the cell. Crossing over is complete
Centrioles
Equator
Spindle fibers
Chromosomes
Metaphase I

4. Homologous chromosomes move to opposite poles of the cell
Homologous chromosomes move to opposite poles of the cell. The cell begins lengthening
Poles
Centrioles
Spindle fibers
Chromosomes
Anaphase I

5. Telophase I and cytokinesis
The chromosomes reach the poles. At each pole, now, there is a complete haploid set of chromosomes .
By the end of this stage the cell has divided into two cells. This separation of the cytoplasm is called cytokinesis.
Centrioles
Cleavage Furrow
Chromosomes
Telophase I and cytokinesis

6. Prophase II begins with the two daughter cells produced by the first meiotic division. A new spindle forms around the chromosomes.
Centrioles
Spindle Fibers
Chromosomes
Spindle Fibers
Prophase II

7. Metaphase II Chromosomes line up at the equator Centrioles
Spindle Fibers
Centromeres
Chromosomes
Spindle Fibers
Metaphase II

8. Centromeres divide. The sister chromatids of each chromosome separate and move toward opposite poles.
Centrioles
Spindle Fibers
Centromeres
Chromosomes
Anaphase II

9. Telophase II and Cytokinsis
The chromosomes reach opposite poles, cytokinesis occurs, the two cells produced by meiosis I divide to form four haploid daughter cells, and nuclear envelopes form. Meiosis is now complete.
Nuclear Envelope
Centrioles
Centromeres
Chromosomes
Telophase II and Cytokinsis

10. Page 142 in book.
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