Pm3110 Unit 1 Assignment 1

Name: Diane Francis Drawer/Group #: G26

PS ID #: 1215058 Three digit mutant code: 489

BIOL 3311 Fall 2015 Lab Section: 5-digit number: 15836

Date: 9/12/2015 TA Instructor Name: Igor Bado

Writing Assignment 1: Description of Unknown Mutant Allele Phenotype

Based on our results we conclude our Drosophila melanogaster 489 mutant expressed an eye mutation, named “rust”, because the pigmentation of the eye appeared dark brown compared to the bright red eye seen in the wild type flies. After comparing wild type and mutant flies, no differences were apparent during the larva and pupa stages. Newly- enclosed adults appeared the same in all aspects except for the coloration of the eyes, as well as adults that were several days old. Adult flies inhered the same bristle structure,

There was no indication of phenotypic differences between male and female mutant flies ,illustrating that the mutation was not sex linked because both mutant sexes possessed the same eye mutation. Male flies in both wild type and mutant flies consisted of the sex combs in the front of the legs, and dark coloration located at the end of the abdomen. Both classes of female flies possessed a tiger- striped abdomen and a tag-like tip at the end of the abdomen. After confirmation of our eye mutation we can assume that our mutation can be due to either genes rosy, garnet, brown, purple, and sepia because these are genes that affect the pigmentation color of the Drosophila melanogaster. Our mutation may be caused by the transportation of the enzyme xanthine dehydrogenase to the rosy gene which causes a deficiency in the pigmentation

Kim, J., Suh, H., Kim, S., Kim, K., Ahn,C., and Yim, J. (2006) Identification and characteristics of the structural gene for the Drosophila eye color mutant sepia, encoding PDA synthase, a member of the Omega class glutathione