Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Vocab Chromosome- Packaged DNA in the nucleus Chromatin- Threadlike coils of chromosomes Sister chromatids- paired chromosomes Centromere- Spot where sister chromatids join Spindle- mesh like web or bridge which form from the centrioles Centrioles- organelle in animal cells which aid in cell division Why do cells divide? Cell gets too big Organisms grow Cells get old and need to be replaced 2 Stages to cell Division: Stage 1: Interphase Stage 2: Mitosis Stage 1: Interphase In between mitosis Cells grow, carry out regular functions. Stage 2: Mitosis Four Stages: –Prophase (pro- means first) –Metaphase (meta- means middle/after) –Anaphase (ana- means apart) –Telophase (telo- means far away/end) Prophase Paired chromatids Chromatin condenses into chromosomes Centrioles move to opposite ends Chromosomes condensing Prophase Metaphase Chromatids line up in the Middle of the cell Spindle fibers attach to centromeres Anaphase Sister chromatids move Apart Spindle fibers pull chromatids to opposite ends of cell Anaphase Telophase Two nuclei are now formed Telophase Cytokinesis Cytoplasm splits Which phases can you see? http://www.cellsalive.com/mitosis.htm Which phases can you see? http://www.cellsalive.com/mitosis.htm Anaphase Metaphase Telophase Prophase Interphase