Flashcards in Meiosis and Mitosis Deck (12):
The different stages:
Telophase and Cytokinesis
Starting cell is diploid (2n = 4)
Homologous chromosomes pit up and exchange fragments (crossing over)
Homologue pairs line up at metaphase plate
Homologues separate to opposite end of the cell
Sister chromatids stay together
Newly forming cells are haploid (n=2)
Each chromosome has two (non-identical) sister chromatids
Has copied DNA so the chromosomes in the nucleus each consist of two connected copies called sister chromatids.
In early phosphate the cell starts to break down some structures and build others up, setting the stage for division of the chromosomes.
In late phosphate the mitotic spindle begins to capture and organize the chromosomes
In metaphase, the spindle has captured all the chromosomes and lined them up at the middle of the cell, ready to divide
In anaphase, the sister chromatids separate from each other and are pulled towards opposite ends of the cell
In telophase, the cell is nearly done dividing, and it starts to re-establish its normal structures as cytokinesis (division of the cell contents) take place.
The division of the cytoplasm to form two new cells, overlap with the final stages of mitosis. It may start in either anaphase or telophase, depending on the cell, and finishes shortly after telophase