Please answer #14-19, explain and clearly indicatewhich # you are answering. Thank you so much!
Q14-19 We crossed pure-bred female flies withyellow body and forked-shaped bristles with male flies extrabristles. The subsequent F1 flies showed all normal phenotypesexcept that all of the F1 males are yellow-body. We crossed againthe normal F1 females with males homozygous for yellow body, extrabristles, and forked bristles as a testcross. The number of eachcategory of F2 progeny is shown below. The mutant allele for yellowbody is y; the mutant allele for extra bristles is e; and themutant allele for forked-shaped bristles is f. The correspondingwild-type alleles for these mutant alleles are indicated with+.
P:        female withyellow body and forked bristles   x   male with extra bristles
F1:      normalfemale          x        male with yellowbody, forked and extra bristles
Cat.  Obs. No/Phenotypes                                       Genotypes                              1         29yellowbody                                             [y,e+,f+]                    2         25yellow body, forked & extra bristles       [y ,e ,f]                                  3         28forked & extrabristles                            [y+,e,f ]                               4         26normal                                                     [y+,e+,f+]                  5         75 extrabristles                                            [y+,e,f+]                             6         74yellow body, extra bristles                     [y ,e,f+]                     7         72forkedbristles                                          [y+,e+,f ]                           8         71yellow body, forked bristles                   [y ,e+,f]                                             Total  400 |
Summary of F2 progeny
14. Which pair of genes is NOT independentlyassorted?
A. y and e
B. y and f
C. e and f
D. all of the above
E. none of the above
15. If there is no crossing-over, which categories wouldNOT be represented?
A. Cat 1 and 2
B. Cat 3 and 4
C. Cat 2 and 3
D. all of the above
E. none of the above
16. Which is the correct genotype for the female F1based on the final mapping results?
A. [y/y+, e/e+, f/f+]
B. [y/y+, e, f/e+,f+]
C. [y/y+, e, f+/e+,f]
D. all of the above
E. none of the above
17. Which wild-type allele y+ was originated from themales of the P stage?
A. y+ allele in the males of Cat 3
B. y+ allele in the males of Cat 4
C. y+ allele in the males of Cat 5
D. y+ allele in the males of Cat 7
E. all of the above
18. Which is incorrect regarding the femaleF1?
A. This female is heterozygous for the three loci.
B. This female inherited the wild-type allele e+ from the femaleof the P stage
C. This female inherited the mutant allele e from the male ofthe P1 stage
D. This female inherited the wild-type allele f+ from the maleof the P1 stage
E. This female inherited the mutant allele y from the male ofthe P1 stage
19. The passage describing the breeding results has notspecified the sexes of F2. If we recalculate the observed number ofeach category based on the sex of individual F2 flies, the overallratio among the 8 categories ________ be affected by the sex,because we have setup the testcross of female F1 with the male withthe recessive ________ allele that is X-linked.
A. would, y
B. would not, y
C. would, e
D. would not, e
E. would , f
