The Process Of Meiosis And Mitosis

1094 WordsMar 8, 20165 Pages
In order to better understand the process of meiosis and mitosis, students observed different types of asci. The arrangement of spores was associated to whether crossing over occurred during meiosis 1. We tried observing asci, from the mating plate that we did last lab, with a light microscope. However, the class was unsuccessful and were told to look for images of asci on google images and use these observations as our data. The observations obtained from google images, showed that 27 observations were made for asci of type 4:4, 19 for asci type 2:2:2:2 and 14 for asci of type 2:4:2 (Table IB-1). With these observations, we determined the map distance which was 27.5 map units (Figure 5.4). Since asci of type 4:4 were observed more, crossing over occurred less, thus producing less asci with different arrangements. Sordaria also undergo mitosis because the end result of meiosis are four haploid cells and haploid cells cannot divide by meiosis. Lastly, since more asci with type 4:4 were observed, the hypothesis was supported—more black ascus were also observed which supported the second hypothesis. Although students were not successful in observing asci during the lab, students were still able to understand the importance of meiosis and relate it to real life issues. INTRODUCTION Meiosis is a two part cell division (meiosis 1 and meiosis 2) process that produces four daughter cells, each having half the number of chromosomes of the parent cell—such as the product of

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