Assume that you are working with Drosophila and are studying genes, a, b, c, d,
ID: 43152 • Letter: A
Question
Assume that you are working with Drosophila and are studying genes, a, b, c, d, e, and f that are all linked in a region on a chromosome, but their order is unknown. In your work, you find that five deletions in the same region uncover recessive alleles of the genes as follows:
Deletion 1 uncovers a, b, and c.
Deletion 2 uncovers a and c.
Deletion 3 uncovers a, c, and e.
Deletion 4 uncovers c, d, and e.
Deletion 5 uncovers d, e, and f
a. What is the order of the genes?
b. Suppose you systematically attempt to generate a chromosomal deletion (using X?rays) that lacks all six genes, but you are unsuccessful. Suggest a plausible explanation for this.
Explanation / Answer
a. order of genes is
f d e c a b
b. since all 6 genes are deleted it will cause probably a light band and thus a higher conc. of the sample can be tried to test the results.
or else i may sound unreasonable but I think due to lack of all genes the entire chromosome is deleted so no results seen.