Please explain your answer and show calculations thanks Use

Please explain your answer and show calculations, thanks!

Use the following information for questions 1-6. The wild-type phenotype in drosophila is non-striped thorax, non-hairy body and dark red eyes. A drosophila female with striped thorax, hairy body and sienna eyes was crossed with a normal male. In the F1 generation, both male and female progeny were normal. An F1 female was test-crossed to a multiply homozygous (or possibly hemizygous) recessive tester male fly, and produced the following progeny (840 total): Which mutant allele(s) in this case, if any, is dominant to its respective wild-type allele? a. Striped thorax b. hairy body c. sienna eyes d. all of the above (a-c) are dominant e. none of the above (a-c) are dominant Which mutant allele(s) in this cross, if any, is/are x-linked? a. Striped thorax b. hairy body c. sienna eyes d. all of the above (a-c) are dominant e. none of the above (a-c) are dominant What is the correct gene order for these data? a. Striped-sienna b. striped-hairy-sienna c. sienna-striped-hairy d. Striped-sienna-hairy e. striped-hairy What is the total length of the map in question 3? a. 16.8 b.20.0 c.56.8 d.67.6 e. no linkage What are the values of chi-square and degree of freedom for fit to expected Mendelian proportions in the above cross? a.481 with 8df b.48lwith 7df c.304 with 7df d. 304 with 8df e. none of the above Which of the following five flies is heterozygous for all mutants involved in this experiment? a. Original parent female with striped thorax, sienna eyes and hairy body b. Original parent male c. Triple mutant (striped, sienna, hairy) in the test cross generation d. Completely wild-type flies in the test cross generation e. Tester male fly

Solution

a) None of the mutations are dominant

b) None of the mutations are X linked because if they are X linked, the half of the F1 males will be with mutations. In the above problem the all the F1 males and females are normal. This indicates that it is not X linked