How many homologous chromosomes are present in Drosophila?
four homologous pairs
The most common species of Drosophila are the Drosophila melanogaster. – Eye color ranges from red to white depending upon the drosophila species and the genetic makeup. – Drosophila just has four homologous pairs of chromosomes in which three are autosomes and one pair of sex chromosomes.
Does mitosis have homologous chromosomes?
In mitosis, homologous chromosomes line up end-to-end so that when they divide, each daughter cell receives a sister chromatid from both members of the homologous pair.
Is Drosophila pseudoobscura an allopatric species?
In 2005, D. pseudoobscura was the second Drosophila species to have its genome sequenced, after the model organism Drosophila melanogaster. Allopatric speciation has been induced by reproductive isolation in D. pseudoobscura after only eight generations using different food types, starch and maltose.
Why is Drosophila a prime candidate for genetic research?
Drosophila is a prime candidate for genetic research because the relationship between human and fruit fly genes is very close. Human and fruit fly genes are so similar, that disease-producing genes in humans can be linked to those in flies.
How many species are in the genus Drosophila?
The genus Drosophila as currently defined is paraphyletic (see below) and contains 1,450 described species, while the total number of species is estimated at thousands. The majority of the species are members of two subgenera: Drosophila (about 1,100 species) and Sophophora (including D. (S.) melanogaster; around 330 species).
How did humans introduce Drosophila to the world?
Several Drosophila species, including D. melanogaster, D. immigrans, and D. simulans, are closely associated with humans, and are often referred to as domestic species. These and other species (D. subobscura, Zaprionus indianus) have been accidentally introduced around the world by human activities such as fruit transports.