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A Study on the Sampling of Drosophila Melanogaster under Various Environmental Conditions


Madappa M. B. , St. Joseph?s College (Autonomous), Bangalore; Sushmitha H. S., Ramaiah College of Arts, Science and Commerce, Bangalore, ; Dr. Balasubramanian Sathyamurthy, Ramaiah College of Arts, Science and Commerce, Bangalore,


Drosophila, Adult Stage, Metamorphosis, Sex Ratio


Usually insects have a very low life span of about a few days. When it comes to Drosophila species, life span is around 12-14 days. Life cycle of drosophila takes place in three stages. All these three stages take place in two days of the development of the flies. On the 5th day of the development, pupa is formed. Pupa is completely developed into an adult within 7 days. Sexual dimorphism and morphological differences within the species can be seen in the adult stage. Sampling of the flies is done in the adult stage. A chemical named methyl farnesoate plays a dual role in regulating Drosophila metamorphosis. Flies were collected in the laboratories and in the canteen using rava-jaggery medium. This media was kept open in two conical flasks in the laboratory for two days. The captured flies were sampled considering the sex, eye shape, and eye colour and wing shape. After sampling, it was found that, males were more in number as compared to females at optimum room temperature without exposure of direct sunlight with no mutants. At optimum room temperature with exposure to direct sunlight, females were more in number as compared to males with no mutants and at optimum room temperature with exposure of direct sunlight along with food waste, the ratio of males and females were almost equal with one vestigial winged mutant.

Other Details

Paper ID: IJSRDV6I60253
Published in: Volume : 6, Issue : 6
Publication Date: 01/09/2018
Page(s): 351-358

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