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Meiosis Phases

Biology

QuestionAnswer
Chromosomes & centriole pairs replicate Interphase I
Each duplicated chromosomes consists of 2 identical sister chromatids attached at their centromere Interphase I
Longest & most complex phase, 90% of meiotic process is spent in this phase Prophase I
Spindle fibers form, centrioles move to the poles & nuclear envelope dissolves Prophase I
Chromatin condenses into replicated chromosomes Prophase I
As homologous chromosomes condense, synapsis occurs Prophase I
Homologous chromosomes come together Synapsis
Crossing over occurs Synapsis
Segments of chromosomes break off & reattach to the paired homologous chromosomes Crossing Over
Leads to greater genetic diversity Crossing Over
Shortest phase Metaphase I
Spindle fibers attach to the centromere of each homologous chromosome Metaphase I
Pairs of homologous chromosomes line up at the equator of the cell Metaphase I
Independent assortment occurs Metaphase I
Homologous chromosomes separate & move toward the poles Anaphase I
Sister chromatids remain attached at their centromeres Anaphase I
Chromosomes uncoil & spindle fibers break down. Nuclear envelopes form around the DNA at each pole creating 2 nuclei Telophase I
Each pole has 2 homologous chromosomes consisting of 2 sister chromatids. Sister chromatids won't be identical due to crossing over Telophase I
Cytokinesis occurs & 2 haploid daughter cells form Telophase I
Similar to mitosis Meiosis II
Nuclear envelope dissolves, chromosomes become visible. Spindle fibers begin to form Prophase II
Chromosomes line up in the middle, spindle fibers attatch Metaphase II
Sister chromatids separate Anaphase II
Nuclei form, cytokinesis occurs, 4 haploid daughter cells are produced Telophase II
Created by: user-2016509
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