1. Prior to meiosis each chromosome is replicated. 2. Two new cells are produced which enter Meiosis II 3. Crossing over occurs.
Cells undergo a round of DNA replication, forming duplicate chromosomes
Each chromosome pairs with its corresponding homologous chromosomes to form a tetrad
Nuclear membrane and nucleous disappears
Spindle fibers attach to the chromosomes and align the homologous pairs at the equator of the cell
The fibers pull the homologous chromosomes toward opposite ends of the cell
Telophase I and Cytokinesis
Nuclear membrane and nucleous forms. The cell seperates into two cells once the cytoplasm divides.
1. No replication. 2. Each entering cell has 2 chromatids. 3. Four haploid daughter cells produced.
Meiosis I results in two haploid (N) daughter cells, each with half the number of chromosomes as the original cell.
The chromosomes (sister chromatids) line up in a similar way to the metaphase stage of mitosis along the equator.
The sister chromatids separate and move toward opposite ends of the cell. Alleles segregate.
Telophase II and Cytokinesis
Meiosis II results in four haploid (N) daughter cells.