Meiosis I
Meiosis 1 is the first Meiosis 1 is referred to as "reductional division," as it results in the separation of recombined homologous cells while the sister chromatids remain attached.
Interphase I
Chromosomes replicate into sister chromatids as centrioles and organelles also replicate. Similar to Interphase during mitosis. Prophase I
The most important stage of Meiosis. During this stage, the homologous chromosomes come together to form bivalents, or tetrads. The Synaptominal complex brings alleles of homologs together to facilitate crossing over. Crossing over involves the sections of homologs wrapping tightly around each other and exchanging DNA in a region called the chiasmata. This process is vital to genetic variation. Metaphase
The tetrads created during Prophase I align on the metaphase plate. Here, the homologs are randomly assorted in alignment. This Independent Assortment also contributes to genetic variation. Anaphase I
Similar to Anaphase during Mitosis, except that only the pairs of sister chromatids are separated. Telophase I
A nuclear envelope will form around the sister chromatids to separate into two nuclei. Cytokinesis I
A cleavage furrow forms to separate into two daughter cells. The cells at the end of Cytokinesis I are diploid. |
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