Interephase and Meiosis I

Meiosis I Separate homologous chromosomes

Centromeres chromosomes replicate

Prohase I

* Chromosomes condense, form tetrads

* synapsis non-sister chromatids cross-over

* nuclear envelope breaks down, centrones move to poles, spindle microtubules form & attach to one side centromeres, tetrads move towards metaphase I plate.Subtopic

Metaphase I

Tetrads arrange on Metaphase I plate

Anaphase I

homologous chromosomes move to poles

Telephase I & Cytokinesis I

* Nuclear envelope may re-form
* Cylokinesus forms two haploid daughter cells
* Sister chromatids remain attached

Prophase II

* Nuclear envelope breaks down,
centrosomes move to poles, spindle
microtubules form & attach to both sides centromeres,
chromosomes move towards meta-phase II plate.

Metaphase II

* Chromosomes arrange on metaphase II plate

Anaphase II

Centromeres separate, Sister chromatids move to poles

Telophase II & cytokinesis

Cytokinesis forms
four haploid daughter cells (two Shown)