Meiosis I Stages
![Picture](/uploads/3/9/6/8/39684254/591800.jpg?227)
Interphase I: *The chromosomes are duplicated.
*Each chromosome has two sister chromatids that are held together by a centromere.
![Picture](/uploads/3/9/6/8/39684254/5377410.gif?175)
Prophase I: *Chromosomes foil up and a spindle forms.
*Homologous chromosomes combine and forming a tetrad.
*Crossing Over may occur and also results in combinations of new alleles on a chromosome.
*Homologous chromosomes combine and forming a tetrad.
*Crossing Over may occur and also results in combinations of new alleles on a chromosome.
![Picture](/uploads/3/9/6/8/39684254/650886.png?244)
Anaphase I: *Chromosomes move to the opposite cell poles.
*Kinetochore fibers interact to pull the chromosomes to the cell poles.
*Sister chromatids remain together after the homologous chromosomes move to opposite poles.
*Kinetochore fibers interact to pull the chromosomes to the cell poles.
*Sister chromatids remain together after the homologous chromosomes move to opposite poles.
Telophase I: *The homologous chromosome pairs complete their migration to the two poles as a result of the action of the spindle.
*A nuclear envelope reforms around each chromosome set, the spindle disappears, and cytokinesis follows. *After cytokinesis, each of the two progeny cells has a nucleus with a haploid set of replicated chromosomes. |