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3. Assume that there are 12 map units between two loci in the mouse and that you are able to microscopically observe meiotic chromosomes in this organism. If you examined 200 primary oocytes, in how many would you expect to see a chiasma between the two loci mentioned above?
I got 2 for an answer. Is that correct?

4. Phenotypically wild F1 female Drosophila, whose mothers had light eyes(Lt) and fathers had straw(stw) bristles produced the following offspring when crossed to homozygous light-straw males:
phenotype: number:
light-straw 22
wild 18
light 990
straw 970
total: 2000
Compute the map distance between light and straw loci.
I got 1.1 mu for an answer. Is that correct?
Thanks in advance for any help.

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