The Control of the Cell Cycle

Mitosis: An Interactive Animation This animation demonstrates the stages of mitosis in an animal cell. Use the control buttons along the bottom to run the complete animation. Click on any intermediate stage (for example, Anaphase), and see a representative still frame. Interphase: Cells may appear inactive during this stage, but they are quite the opposite. Prophase: During this first mitotic stage, the nucleolus fades and chromatin (replicated DNA and associated proteins) condenses into chromosomes. Prometaphase: In this stage the nuclear envelope breaks down so there is no longer a recognizable nucleus. Metaphase: Tension applied by the spindle fibers aligns all chromosomes in one plane at the center of the cell. Anaphase: Spindle fibers shorten, the kinetochores separate, and the chromatids (daughter chromosomes) are pulled apart and begin moving to the cell poles. Telophase: The daughter chromosomes arrive at the poles and the spindle fibers that have pulled them apart disappear.

Operate Now: Brain Surgery To play the super cool games on www.agame.com, you need a plugin called Flash. Chrome, the browser you’re using, will not have this anymore. If you see this icon: , in the top right-hand corner of your browser, click on it. To play the games, you need to click on “Always allow plugins on www.agame.com”. It’s safe, don’t worry. To always have a super-awesome time on our website, we also recommend to do these quick steps:Type [ in the address bar on top, and then press Enter to open the Plugins section of Chrome 1. Fehérjék The WikiPremed MCAT Course is a free comprehensive course in the undergraduate level general sciences. Undergraduate level physics, chemistry, organic chemistry and biology are presented by this course as a unified whole within a spiraling curriculum.Please read our policies on privacy and shipping & returns.Contact Us.MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the WikiPremed Course. The work of WikiPremed is published under a Creative Commons Attribution Share Alike 3.0 License. There are elements of work here, such as a subset of the images in the archive from WikiPedia, that originated as GNU General Public License works, so take care to follow the unique stipulations of that license in printed reproductions. You can use the resources here for commercial or non-commercial purposes, but please give attribution and a link to the production credits and edit history of the resource.

Translation Cell Division Cell Size and Scale Some cells are visible to the unaided eye The smallest objects that the unaided human eye can see are about 0.1 mm long. That means that under the right conditions, you might be able to see an ameoba proteus, a human egg, and a paramecium without using magnification. Smaller cells are easily visible under a light microscope. To see anything smaller than 500 nm, you will need an electron microscope. Adenine The label on the nucleotide is not quite accurate. How can an X chromosome be nearly as big as the head of the sperm cell? No, this isn't a mistake. The X chromosome is shown here in a condensed state, as it would appear in a cell that's going through mitosis. A chromosome is made up of genetic material (one long piece of DNA) wrapped around structural support proteins (histones). Carbon The size of the carbon atom is based on its van der Waals radius.

Protein Synthesis "Pea Soup" - Pea Experiment This is an interactive pea experiment where you can breed your own hybrid pea plants! You will start with two parent plants and end up with four child plants *. Pick two of those to breed together for four new children, and so on. There are two attributes passed between generations in this simulation. Pea color (green or yellow) Pea shape (round or wrinkled) Each of these attributes are 'simple traits,' that is, there is no 'grey' area of an attribute. The source code to this program is available.