In the P1 generation, bent wing, javelin bristle Drosophila females were crossed
ID: 170715 • Letter: I
Question
In the P1 generation, bent wing, javelin bristle Drosophila females were crossed with wild type males. The resulting F1 flies were all phenotypically wild type. When the F1 female flies were crossed to a homozygous recessive male, the following offspring were observed: bent wing, javelin bristle 105 bent wing, normal bristle 43 normal wing, javelin bristle 47 wild type 95 Total 290 The genes for bent wing and javelin bristle are: a) linked b) no linkage was observed In a series of timed mating experiments with four strains of E. coli, the following sequences of gene transfer, listed earlier to later were observed: Strain 1: PRT Strain 2: ZWT Strain 3: ZMP Strain 4: RPM The sequence of the genes on the chromosome was: a) PRTZWTZMPRPM b) PRTZWTZMP c) PRTWZM d) TRPWZMExplanation / Answer
Question : The gene coding for vermilion eye colour is ;
Answer: b) Autosomal
Homozygous affected parent, Male and female offspring effected at the same rate.