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A fruitfly with leg bristles and red eyes (genotype RrBb) was mated with the white-eyed fly lacking bristles (rrbb). Five hundred offspring were counted, with following results:

58 Rrbb offspring; 62 rrBb offspring; 200 RrBb offspring; 180 rrbb offspring.

Based upon such results, how much distance is between such two genes on the chromosome?

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