You have calculated the interference value for a given mapping experiment to be

Question

You have calculated the interference value for a given mapping experiment to be 30%. What does this mean? 70% fewer double crossovers than expected 70% more double crossovers than expected 30% fewer double crossovers than expected 30% more double crossovers than expected A map distance of 23 6 between 2 genes indicates which of the following? The genes are 23.6 millimeters apart 23.6% of the offspring do not survive 23 6% of the offspring exhibit recombination between the 2 genes there are 23.6 other genes between the two genes of interest.

Explanation / Answer

20 c. 30% fewer double crossovers occurred than expected

(Interference means that the crossovers in adjacent chromosome regions are not independent )

21. C 23.6% of the offspring exhibit recombination between the two genes

(One map unit is defined as the distance between genes for which one product of meiosis out of 100 is recombinant)

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