In the mapping example in Fig 2, the dominant alleles were on one chromosome and the recessive alleles were on the homolog. Let’s consider a twofactor cross in which the dominant allele for one gene is on onechromosome, but the dominant allele for a second gene is on thehomolog. A cross is made between AAbb and aaBB parents. The F1offspring are AaBb. The F1 heterozygotes are then testcrossed to aabbindividuals. What topic in genetics does this question address? Parontal generationLong brtstlesGray bodyShort bristlesEbony bodystso'esse0TostcrossF, hotorozygoteHomozygousrocessiveIndividualF2 gonorations'so'eSse'eLong bristlesGray bodyNonrecombinantShort bristlosEbony bodyNonrecombinantLong bristlesEbony bodyRecombinantShort bristlesGray bodyRocombinantTotal:5375427675Use of a testcross to distinguish between recombinant and nonrecombinant offspring - The parental generation beginswith two different true-breeding strains to produce an F1 heterozygote. In the testcross, an F1 female that isheterozygous for both genes (s+se+e) is crossed to a male that is homozygous recessive for short bristles (ss) andebony body (ee). The F2 recombinant offspring carry a chromosome that is the product of a crossover.(Note: Crossing over does not occur during sperm formation in Drosophila, which is unusual among eukaryotes. Therefore,the heterozygote in a testcross involving Drosophila must be the female.)

Name: In the mapping example in Fig 2, the dominant alleles were on one chro
Uploaded: 2024-03-20T06:43:04.000Z
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Description: In the mapping example in Fig 2, the dominant alleles were on one chromosome and the recessive alleles were on the homolog. Let’s consider a twofactor cross in which the dominant allele for one gene is on onechromosome, but the dominant allele for a