Meosis

Meiosis

Meiosis is responsible for the gametes used in reproduction. Meiosis is the process in which two haploid cells are produced form a diploid cell.  Mitosis results in two diploid daughter cells. Meiosis results in 4 haploid daughter cells. During interphase the chromosomes duplicate, called sister chromatids and the centrioles develop. During prophase the Sister chromatids are connected by centromeres. Homologous chromatids line up next to each other and crossing over occurs increasing genetic diversity.  Centrioles move to opposite ends of the cell. during metaphase 1 spindle fibers attached to either of the aligned sister chromatid’s centromere. During anaphase 1 these fibers pull the chromatids to either end of the cell. Telophase 1 &  cytokinesis 1 – Nuclear envelope reforms and cells separate via cleavage furrow. first cycle ends in two genetically different diploid cells. Round two differs in that the chromosomes do not duplicate and in metaphase 2 the sister chromatids are split evenly into either cell resulting in 4 genetically diverse haploid cells after telophase 2. Haploid cell will turn into sperm or egg depending on sex. These cells contain half the genetic material/chromosomes needed to create another generation. No gamete is identical.

This video helps me understand Meiosis better by providing a visual animation showing the process in motion. The narrator is explaining what is happening in the video. Instead of a static image of the phases in a textbook I can watch a virtualization of the actual process and see where the chromosomes duplicate and how they line up and split off during meiosis and this video even shows how it differs from mitosis’s process. It helps me understand the processes in motion.

Leave a Reply

Your email address will not be published. Required fields are marked *