- International Journal of Pure and Applied Zoology (2013) Volume 1, Issue 4

Inheritance Pattern of Sex-Linked Trait and Feeding and Sexual Behaviour of Drosophila Melanogaster

This study was aimed to unravel the inheritance pattern of sex-linked trait (eye colour) and the feeding and sexual behaviour of Drosophila melanogaster. D. melanogaster was collected and identified the wild and mutant type flies; were kept in the culture vial and designed mating was done at a ratio of 1:5 male and female. In this experiment, the inheritance pattern of sex-linked trait (eye colour) was studied. The resulting offspring were counted and recorded, and chosen for further mating and study. Total number of wild type flies was higher than the mutant type flies. Moreover, the mutant type male flies were decreased in number in the subsequent generation due to selection against mutant type in each generation. It was observed that the desirable gene (wild type gene) frequencies were increased and undesirable gene (mutant type gene) frequencies were decreased significantly from 1st to 3rd generation. The feeding and sexual behaviour was observed by naked eye in different time interval. The larvae always attached with the culture and took the culture media as food up to pupa stage. However, the adults were stayed away from media; they were in media for half an hour after one to two hours interval. In case of mating behaviour, it was observed that the males tried to attract females by vibrating their wings as well as licking the female genitalia. After accepting the male by female drosophila, successful mating was observed for approximately 15 to 20 minutes.

Author(s): Tahmina Bilkis, Md. Kabirul Islam Khan, Md. Sydur Rahman and Gazi Md. Noor Uddin

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