Researchers' initial understanding of meiosis was based upon careful observations of chromosome behavior using light microscopes. Then, in the 1950s, electron microscopy provided scientists with a ...

The chromosomes are loosely packed and not visible with a microscope. Two pair of centrioles lie just outside the nucleus, next to each other. A centriole is a cylindrical structure within the ...

Welcome to Mitosis vs. Meiosis. This half of the screen illustrates mitosis—the division of a cell's nucleus. Along with cytokinesis (the division of the rest of a cell), mitosis results in a ...