Academic Integrity: tutoring, explanations, and feedback — we don’t complete graded work or submit on a student’s behalf.

please draw map for points!!!!******* orkuanswer for Th Drosophila, brittle (b).

ID: 48740 • Letter: P

Question

please draw map for points!!!!*******


orkuanswer for Th Drosophila, brittle (b). ebony body (e) and gaucho (g) are three recessive genes If homozygous EBONY females are crossed with homozygous BRITTLE&GAUCHO; males, the resulting F1 progeny are all wild-type If heterozygous F1 females are mated with EBONY BRITTLE & GAUCHO males, the following 1,000 progeny appear brittle, gaucho: 290 a) Derive a map for the three C Derive a map for the three genes ebony: 280 brittle, ebony: 8 gaucho: 12 brittle: 120 ebony, gaucho: 110 wild-type: 88 rittle, gaucho, ebony: 92

Explanation / Answer

brittle:bb, ebony:ee, guacho:gg

bEG (female) * Beg (male)= F1 BbEeGg wild type gamets bE,bG,EG

BBeeGG (ebony) = 280 brittle guacho (bbEEgg) = 290

brittle (bbEEGG) =120    brittle ebony (bbeeGG) =8

guacho (BBEEgg)=12 ebony guacho (BBeegg) =110

wild (BBEEGG)=88   brittle ebony guacho (bbeegg)=92

BBeeGG, bbEEgg = parental genotype double cross over =BBEEgg and bbeeGG

sequence of the genes on the map = BB, GG, EE

map position of between B and E= 1.04cM, B and G= 0.128, E and G= 0.28cM