Question

In Drosophila, the autosomal recessive brown eye color mutation (b) displays interactions with both the X-linked recessive vermilion mutation (v) and the autosomal recessive scarlet (s) mutation. Flies homozygous for brown and simultaneously hemizygous or homozygous for vermilion have white eyes. Flies simultaneously homozygous for both the brown and scarlet mutations also have white eyes. Flies that are wildtype at all 3 loci have wildtype eye color. Flies that are homozygous or hemizygous for the recessive mutant at only one locus show that mutations color. (i.e. brown, vermillion or scarlet). Use this information to answer the next 4 questions.

Question 6 0.25 pts Predict the F1 progeny of crossing a true breeding vermilion female X brown male. all wild type o wild type females brown males wild type females vermillion males vermilion females white males

Answer 1

- wt. хвили, wt . proven + + wt. Tut wt. . + TT + bronen wt. wt. Wt. wildtype = brown scarlet white - 3 = 3 = 1 option I ň Correct

It is given that rown eye mutation - A10 Autosomal -linked recessive veemillion X scarlet Autosomal by se - white age Vermillion lemale x brown male - both genes are on different chromosomes so the The Organism is named on basis of mutation it is having If female in vermillion, it means it is wildtype brown eye locê. All the questions will be answere accordingly female = wild tybe t = w ; t t Vermillion male Option F Cross = c is correct v ; + x v; + white Verm verm Vermillion

brown wt. o t + white verm verm browon wt Females White - (wt) brown - 1 vermillion - 3 Males wildtype - 3 White - I , Vermillion 3 brown - correcta I option D is le X brown male

option D is correct I Scarlet Jernale x brown male + b + no to all - as male these are & female on we'll autosomal be of Chromosomes wild type. Oftion D is correct. a Fi Cross = Cross - sc ; 35 X 2 Ас + AC Sc & b sc Barlet scarlet White scarlet