∞ generated and posted on 2020.12.19 ∞
Completion of a cell cycle that begins with a single cell and ends with more than one descendant cells.
| The goal in viewing the presented videos is to gain an appreciation of cell division. Cell division can be distinguished into what goes on within a cell toward duplication of its components and the actual division of a cell's cytoplasm into more than one volume. Among those things that go on within the cell are mitosis and meiosis while division of the cytoplasm is termed cytokinesis and division of one especially simpler cell into two is described as binary fission. |
Cell division by bacteria is called binary fission and does not involve either mitosis or meiosis.
The above video considers a bit more than "just" mitosis, and also does not include prometaphase, which is that long jostling period there described as metaphase.
The above video provides a cartoon animation of normal, everyday mitotic cell division by eukaryotes.
This video is a really nice overview of what goes on during mitosis cell division by eukaryotes, looking at the process from multiple perspectives including those of the cell membrane, nuclear membrane, centrosomes, chromosomes, sister chromatids, and microtubules as well as the mitotic spindle. Note though that the phrasing "a new nuclei" is incorrect, i.e., it should be either "a new nucleus" or "new nuclei" without the indefinite article, "a".
The above video considers meiosis, in all of its glorious complexity. Note both its similarity to and differences from meiosis.
The above video provides a cartoon animation of meiosis, which can be thought of as the first step toward sexual reproduction by eukaryotes. Note both its similarity to and differences from meiosis.
This video is a really nice overview of what goes on during meiotic cell division by eukaryotes. Note both its similarity to and differences from meiosis. Note also that he does keep using the plural of nucleus where he should be using the singular…
This video calls what you are seeing binary fission, by a protozoan, that's about to become two protozoa,, and that's not incorrect (since people apply the term binary fission not just to bacteria), but really what is being captured here is cytokinesis.