Meiosis Meiosis ReviewReview

Meiosis I: ReplicationMeiosis I: Replication

Interphase IInterphase I DNA ReplicationDNA Replication Chromatin a “ball of Chromatin a “ball of yarn”yarn”

Prophase IProphase I Chromosomes Chromosomes coil and coil and condensecondense

Form a tetrad Form a tetrad ((synapsissynapsis))

Metaphase IMetaphase I Tetrads Tetrads align along align along equatorequator

Anaphase IAnaphase I Tetrads Tetrads

splitsplit Form dyadsForm dyads Dyads Dyads

move to move to opposite opposite polespoles

Telophase ITelophase I Cleavage furrow Cleavage furrow

formsforms Cell splits Cell splits

((cytokinesiscytokinesis)) Form two diploid Form two diploid

daughter cellsdaughter cells

Meiosis II: Reduction Meiosis II: Reduction DivisionDivision

InterkinesisInterkinesis Similar to Interphase ISimilar to Interphase I No DNA replicationNo DNA replication

Prophase IIProphase II Chromosomes condense Chromosomes condense and coiland coil

Metaphase IIMetaphase II Chromosomes Chromosomes

align along align along equatorequator

Anaphase IIAnaphase II Dyads split at Dyads split at centromerecentromere

Chromatids move to Chromatids move to opposite polesopposite poles

Telophase IITelophase II Cleavage Cleavage

furrow forms furrow forms Cell splitsCell splits Both diploid Both diploid

cell splitscell splits Forms 4 haploid daughter cellsForms 4 haploid daughter cells