Solved:
Answered by AI, Verified by Human Experts
Suppose a geneticist uses a three point testcross to map three recessive, linked hummingbird wing shape mutations called tn, r, and b, where tn is associated with thin wings, r is associated with round wings, and b is associated with blunt wings. He first crosses homozygous blunt birds to homozygous thin, round birds. Next, he testcrosses the F1 progeny to thin, round, blunt birds. He obtained the results shown.Given this data, label the progeny phenotypic classes as either parental, single crossover (SCO), or double crossover (DCO) recombinant types. Each label may be used multiple times. Two classes have already been filled in.Phenotype Number Recombinant typeblunt 821 thin, round 815 round 179 thin, blunt 161 SCOthin 7 round, blunt 8 thin, round, blunt 24 SCOwild type 27 Answer Bank:parentalDCOSCO
Suppose a geneticist uses a three point testcross to map three recessive, linked hummingbird wing shape mutations called tn, r, and b, where tn is associated with thin wings, r is associated with round wings, and b is associated with blunt wings. He first crosses homozygous blunt birds to homozygous thin, round birds. Next, he testcrosses the F1 progeny to thin, round, blunt birds. He obtained the results shown.Given this data, label the progeny phenotypic classes as either parental, single crossover (SCO), or double crossover (DCO) recombinant types. Each label may be used multiple times. Two classes have already been filled in.Phenotype Number Recombinant typeblunt 821 thin, round 815 round 179 thin, blunt 161 SCOthin 7 round, blunt 8 thin, round, blunt 24 SCOwild type 27 Answer Bank:parentalDCOSCO
The progenyphenotypicclasses can be classified asparental: blunt and thick and round, SCO: thick and blunt, round, thick, round and blunt; DCO: thick, round and blunt.First, the geneticist crosseshomozygousrapid, zigzag flies with homozygous narrow flies. The Fi progeny is then testcrossed to fast, zigzag, and narrow parents, yielding the results shown in the table. A three point testcross in linkage analysis refers to examining the inheritance pattern of three alleles by mating a triple recessive homozygote with a tripleheterozygote. It allows us to establish the spacing between the three alleles as well as their chromosomal order.Based on the observation from the given data, theprogenyphenotypic classes can be labelled as follows:Blunt- parentalThick, round- parentalRound- SCOThick, blunt- SCOThick-DCORound, blunt- DCOThick, round, blunt- SCOWild type-SCOTo know more about atest-cross, refer to the following link:brainly.com/question/15591373#SPJ4...