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During the process of meiosis in the female (oogenesis), two meiotic divisions occur. This leads to the formation of the ovum, and three polar bodies. These divisions involve an unequal division of the cytoplasm. This unequal division of the cytoplasm insures that the ovum that will be fertilized will have ample nutrients while traveling in the uterus. How does this compare with spermatogenesis?
In humans, the genes for red-green color blindness (R = normal, r = color-blind) and hemophilia A (H = normal, h = hemophilia) are both X-linked and only 3 map units apart. Suppose a woman has four sons, and two are colorblind and have hemophilia ..
Determine the genotypes of parental, recombinant and if applicable double and triple recombinant progeny from the testcrosses of following individuals.
Use the I/v curves for leak and INa describe how the treshold of an action potential can be dtermined and the peak height.
Describe how the cell derives additional energy by switching . What was the key factor that determined this change.
Assume you are a scientist at a genetic testing company. Describe how you would take one approach to testing relatedness between two individuals,
My favorite bird is the black crowned night heron. The relative proportion of males to females is hypothesized to vary with season.
Mycoplasmas are the simplest self-replicating (free-living) bacterium known. The Mycoplasma genitalium genome is 580,000 bases in length. Approximately how many genes does this bacterial genome encode.
Compute the surface-area-to-volume ratio of a cube whose sides are 100 um in length to estimated the surface-area-to-volume ratio of the fern spore cell.
Suppose that you require to dilute a 3mM solution to a concentration of 1 x 10-6 M. Pipettors that dispense volumes ranging from 10~100.
Flask A includes yeast cells in glucose-minimal salts broth incubated at 30C with aeration. Flask B contains yeast cells in a glucose-minimal salt broth incubated at 30C in an anaerobic jar.
Would you expect the measurements to be equivalent in both preparations? If a variation in size is expected, how will you account for this difference.
Normal cells greatly slow their rates of cell division after filling culture dish with layer that is one cell deep. If a circular group of cells is removed from the middle of the filled culture dish.
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