Biology Mitosis Lab Essay

1243 Words Oct 27th, 2012 5 Pages
AP BIOLOGY-
Mitosis and Meiosis Cell Division Lab

Part 1-MITOSIS

summary:
In this experiment first the stages of an onion cell undergoing mitosis are going to be observed and every stage is going to be detected and drawn on paper. A brief description to what is going on should be attached to the pictures. This is important to understand the basics of cell division which is necessary growth,repair and asexual reproduction. Second the number of cells undergoing each phase is going to be counted to figure out in which phase the cell remains the most. If interphase is the stage in which the cell grows and prepares for cell division then the
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The complement of interphase is very important for organisms. If interphase isn’t completed before division or if something goes wrong during it many problems could occur like mutations or other things which would affect the proper functioning of the organism.
The possibility of errors emerging in this experiment is very low. The only errors could be caused if something was wrong with the microscopes lens or objective. Another thing to be researched could be what factors effect mitosis and if the same process would still occur in a different environment.

Part 2-MEIOSIS
In this part the concept of meiosis which is the essential of sexual reproduction is going to be observed by using Sondaria fimicola a certain type of mushroom. The colors of the ascospores before and after meiosis are going to be observed to see whether there is crossing over or not. If meiosis is occurring then the newly formed sequences will look different then the ones to begin with. Observe the S. fimicola undergoing meiosis. Look at the ascospores after meiosis and notice the pattern. If the changes are in a 4:4 manner there is no crossing over. If any series of 2 like 2:4:2 or 2:2:2:2 occur it means that crossing over took place. The results we got were composed of different sequences including both patterns with 4’s and 2’s which means that crossing over took place.

*Because S.fimicola was not available for the lab,cards with

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