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a. In fruit flies, the recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild- type flies have bri


32. In fruit flies, the recessive pr and cn mutations cause brown and bright-red eyes, respectively (wild- type flies have br



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31) here genotype of father is prprcncn, because he has orange eyes, pr+pr+cn+cn+, if this is the genotype of the mother then all progenies would have wildtype eyes, so this is not the genotype so genotype of the mother is pr+prcn+cn, the mother is obtained by the cross between 2 pure breeding lines so those lines are prprcn+cn+ and pr+pr+cncn so that the progeny is pr+prcn+cn so the answer is A) prprcn+cn+ and pr+pr+cncn

32) genotype of Mother is pr+prcn+cn, we can write this as pr+cn/prcn+

then gametes produced are pr+cn, prcn+, these 2 are parental type gametes and pr+cn+ and prcn are recombinant gametes

the phenotype of the progeny when recombinant gamete combines with prcn from father is

pr+cn+- wildtype

prcn- orange so the

recombination frequency=number of recombinants/total number*100

=12+8/500*100

=4%

so the distance between genes is 4 mu so the answer is C) 4 mu

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