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===Meiosis I===
This is the process by which a diploid cell divides into two haploid cells. These two haploid cells still have duplicated chromosomes, however, so the two cells must enter Meiosis II following.
====Prophase I====
During Prophase I, the chromosomes cross over and the centrioles move to opposite ends of the cell and begin to form the mitotic spindle.
====Metaphase I====
The chromosomes line up on the metaphase plate, and the microtubules from each centriole grab one chromosome from each homologous pair.
====Anaphase I====
The microtubules pull the chromosome pairs apart, so that each centriole gets one chromosome from each pair.
====Telophase I====
The cell membrane constricts in order to cut off the two cells, and nuclei begin to form around the chromosomes. <u>The chromosomes are still duplicated</u>, so now the cells undergo Meiosis II.
===Meiosis II===
This is the process by which the two haploid cells (with duplicated chromosomes; produced during Meiosis I) split into two more cells, so that the final product of Meiosis is four haploid cells.
====Prophase II====
The centrioles duplicate again and move to opposite ends of the cells, and the spindles begin to form.
====Metaphase II====
The chromosomes line up on the metaphase plate and the spindles from the centrioles attach to each chromosome.
====Anaphase II====
The centrioles pull the chromosomes apart, much like in mitosis, and each centriole gets one half of each chromosome.
====Telophase II====
The cell membranes constrict and a nuclear membrane forms around the chromosomes. The end result of meiosis is four cells with only one chromosome from each homologous pair. These are called gametes.

Translations:Adventist Youth Honors Answer Book/Health and Science/Heredity/46/en - Revision history

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