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5 Cards in this Set

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What are the phases of meiosis?
Prophase I, Metaphase I, Anaphase I, Telophase I, (Interphase,) Prophase II, Metaphase II, Anaphase II, Telophase II.
Describe the process of Prophase I.
-Chromosome becomes visible as two sister chromatids
-Homologous chromosomes pair up
-Nucleolus and nuclear envelope disintegrates
-Chromosome appear double-stranded
-Chiasmata become visible; chromosomes still attracted to each other
-Centriole begin to move away; spindle forms
Describe the process of Metaphase I.
-The bivalents go to the spindle.
-Arrangements are random of other bivalents.
-Centromeres become attached to spindle fibres.
Describe the process of Anaphase I.
-Homologous chromosomes separate; pulled to two poles
-Could be due to shortening of specific spindle fibres
Describe the process of Telophase I.
-Chromosomes reach opposite poles of spindle.
-Spindle fibres disintegrate.
-Nuclear envelope & nucleoli reform
-May enter interphase but NO DNA replication occurs.