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Meiosis
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Meiosis
A single replication of chromosomes with 2 cell divisions.
Reluslts in 4 daughter cells with haploid (N) chromosome #
Meiosis I
Prophase I, Metaphase I, Anaphase I, Telophase I
Meiosis II
No DNA replication
Prophase II, Metaphase II, Anaphse II, Telophase II
Prophase I
Longer and more complex than mitosis
Chromosomes condense & attach to Nuclear membrane-
Bivalents
form.
synapsis occurs-
tetrad forms
Crossing over occurs at chiasmata (one to several places)
Genetic Recombination
Genetic Recombination
Mix DNA from nonsister chromatids
Metaphase I
Bivalents line up on the equator
Anaphase I
Homologous split-sister chromatids stay attached.
Reduces chromosome # to haploid
Telophase I
Haploid set of chromosomes at each pole
Cytokinesis occurs
Meiosis II
No DNA replication
Prophase II
Spindles more chromosomes to equator
Metaphase II
Line up on equator
Anaphase II
Sister chromatids seperate & move to poles
Telophase II
Nuclei form around 4 haploid daughter cells
Interphase I
Chromosome replicates and has same structures as mitosis
Mitosis
2 daughter cells
Maintains same chromosome #
No genetic recombination
Meiosis
4 daughter cells
Reduces to haploid from diploid chromosome #
Genetic recombination occurs
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Author
rileyrichardson
ID
186192
Card Set
Meiosis
Description
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Updated
2012-11-30T03:39:19Z
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