Meiosis I & II

DE Bio Unit 4

the nuclear envelope breaks down, the centriole pairs start to move to opposite poles, and the chromosomes condense and become visible

Occurs in Prophase of Meiosis 1 and 2 

what is another name for centriole pairs

centrosomes

the spindle has formed completely

Occurs in Metaphase of Meiosis 1 and 2

the spindle fibers begin to contract

Occurs in Anaphase of Meiosis 1 and 2

nuclear envelopes start to reform around the groups of chromosomes, the chromosomes start to decondense back into chromatin

Occurs in Telophase of Meiosis 1 and 2

the cytoplasm physically divides, splitting each cell into two cells

Occurs in Cytokinesis of Meiosis 1 and 2

crossing over occurs between homologous chromosomes

Occurs in Prophase of Meiosis 1

Homologous pairs of chromosomes line up in the middle of the cell

Occurs in Metaphase of Meiosis 1

The homologous chromosomes get separated as they are pulled by their centromeres to the poles

Occurs in Anaphase of Meiosis 1

The chromosomes line up in the middle of the cell

Occurs in Metaphase of Meiosis 2

The sister chromatids get separated as they are pulled by their centromeres to the poles

Occurs in Anaphase of Meiosis 2

The cells are now in interphase.

Occurs in Cytokinesis of Meiosis 2