Meiosis

 This week in AP Biology we went over meiosis. Meiosis is divided into 2 different parts, meiosis 1 and meiosis 2. Meiosis 2 is the most similar to mitosis. In meiosis 1 there are four stages prophase 1, metaphase 1, anaphase 1, and telophase 1. In prophase 1 chromosomes condense, homologous chromosomes attach, crossing over between chromosomes, and centrioles move to opposite ends. In metaphase 1 the tetras line up at the metaphase plate. During anaphase 1 the homologous chromosomes are separated and taken to opposite poles. After anaphase 1, telophase occurs and the sister chromosomes continued to be pulled. Cytokinesis then takes place. After that meiosis 2 takes place which is very similar to mitosis. 

 Mitosis and meiosis differ greatly in their end products; mitosis results in 2 genetically identical diploid cell and meiosis results in 4 genetically different haploid cells.