Onion Root Lab

We first used a virtual tour to learn more about mitosis and the steps. The first we learned about was the Resting cell. It is in interphase and it has to go through synthesis before it goes in. Synthesis is a phase where each of the chromosomes are duplicated and there are two sister chromatids and than they are joined by a specific DNA sequence and become a centromere. Then we get to the first phase of mitosis which is prophase. The prophase is where the nuclear chromatin starts to become organized and it condenses into thick strands which become chromosomes. The cytoskeleton in the prophase begins too disassemble and the mitotic symbol forms outside of the nucleus. Prometaphase is when the nuclear envelope erupts and it is broken down into small membrane vesicles which continue condensing, shortening and thickening until they form the units to undergo mitosis. The nucleousis disappears and the mitotic spindle microtubules enter the nuclear region. The next is metaphase where the chromosomes align in one plane. Anaphase is the phase that comes immediately after the metaphase. The chromosomes are aligned at the metaphase plate and it happens really fast. When the chromosomes move to the spindle poles the kinetochore microtubules begin to disappear. The telophase is the last phase where the daughter chromosomes go to the spindle poles and are redistributed into chromatins. The chromosomes separate. Than after reading about it we did a lab and these are the results.


http://nces.ed.gov/nceskids/createagraph/graphwrite.aspx?ID=dcb68afe190e4e8b821aecf5dee5cd2d&download=true&file=pdf