4. In Drosophilia, the allele b gives black body (wild type is b+ or brown), and at a different gene locus, the allele cn gives cinnabar eyes (wild type eyes are cn+ or red.) A female which is heterozygous for both genes is testcrossed. [A testcross is a mating ma ly that is homozvgous for all recessive mutant traits. a male, homozygous for black and cinnabar.J Male: b b/cn cn In this case, the fly is Female b b+/cn cn+ The following progeny are observed: 53 brown body, red eyes 50 black body, cinnabar eyes A. Write the genotypes of each class of progeny. 451 brown body, cinnabar eyes 446 blackbody, red eyes the fomawo most common groups of progeny each bear one of the parental chromosomes from Lemale. (Remember the two parental chromosomes segregate during gamete formation.) on the two chromosomes from the female. prane two least common groups of progeny represent recombination events during meiosis. Draw which alleles are present on the recombined chromosomes. D. Calculate the percent of recombinants in this cross. between genes. Draw which alleles are This is a measure of distance Each 1% is called one map unit.

4. You find that all four flower color genes map to the second chromosome, and perform complementation tests with deletions for each gene. You obtain the following results: (mutant a = blue, mutant b = white, mutant c = pink, mutant d = red) wolod Results of Complementation tests suld Jostum Mutant a b с Del (2.2 -2.6) blue white pink purple Del (2.3-2.8) blue white pink red Del (2.1 -2.5) blue purple pink purple Del (2.4-2.7) purple white pink red C d Indicate where each gene maps: a b ori ai indW (anioq 2) .8

Please find the attachment

2. Drosophila females heterozygous for three recessive x-linked markers y (yellow bodies), ct (cut wings), and m (miniature wings) were crossed to y ct m males and the following progeny were obtained. F1 Phenotype Yellow, cut, miniature Wildtype Yellow Cut, miniature miniature Number cut 60 63 20 13 Yellow, cut 15 Yellow, miniature 5 22 2 a) F1 Genotype b) Recombinant or Parental? c) SCO, DCO, or NONE? a) Fill in the table with the genotypes of each progeny type, use + to indicate wildtype/dominant traits, show separate homologues. b) In the table, identify whether each progeny type is Recombinant (R) or Parental (P). c) In the table, identify whether each progeny type results from a single crossover (SCO), a double crossover (DCO), or no crossing over (NONE). d) Diagram the parental cross, clearly indicating allelic contributions from each homologue of parental flies. Heterozygous wild-type Female Fly X Hemizygous mutant Male fly // // e) Draw the genetic map showing correct order and…