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Unformatted text preview: e assumptions on
which your hypothesis is based. At that point, it would be wise as a researcher to explore
So how is this directly applied to genetics research?
In classical genetics research where you are trying to determine the inheritance pattern of a
phenotype, you establish your predicted genetic explanation and the expected phenotype ratios in
the offspring as your hypothesis. For example, you think a mutant trait in fruit flies has simple
dominant inheritance. To test this you would set up a cross between 2 true-breeding flies:
mutant female x wild-type male Biol 302, Fall 2013
You would then predict the ratios of phenotypes you would expect from this cross. This then
establishes an hypothesis that any difference from these results will not be significant and will be
due to random chance alone. This is referred to as your “null hypothesis”. It, in essence, says that
you propose that nothing else — no ot...
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