Introduction to Drosophila Genetics Essay - 3748 Words.
Drosophila sp. found all over the world, but most of their species are predominant in the tropical regions. They are multivoltine species, and the northern species can hibernate. They breed in various kinds of decaying plants and fungal materials. The larvae of some species can also feed on fresh fruit and can sometimes be a pest ( Mark Hoddle). Some other few species maybe switched in order.
Drosophila have three main body segments--the head, thorax, and abdomen--as well as a single pair of wings, and three pairs of legs. They are between 2-4 mm long and weigh about 1 mg. Females are typically larger than males. Wild-type fruit flies have large red eyes, and pale yellow or light brown bodies with black stripes on the abdomen. The Drosophila life cycle is about 2 weeks long, and is.
The hydei subgroup (Drosophila repleta group) consists of seven species divided into two complexes: bifurca and hydei, whose phylogenetic relationships are not well understood. To evaluate the molecular phylogeny of this subgroup, we analyzed 2085 bp of coding sequence of the Xanthine dehydrogenase gene in six available species of the hydei subgroup, with Drosophila buzzatii and Drosophila.
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Life cycle of Drosophila The drosophila egg is about mm long. It takes about one day after fertilisation for the embryo to grow and emerge into a worm-like larva. The larva eats and develops constantly, moulting one day, two days, and four days after hatching (first, second and third instars). After two days as a third instar larva, it moults one more time to form a motionless pupa. Over the.