Drosophila lacertosa is widely distributed from northern India to Far East of Russia throughout China. We have studied geographical distributions of three kinds of chromosomal karyotypes, type D ...

The term "karyotype" refers to the chromosomal pattern inside the nucleus of an animal cell (eukaryote), as well as to describes the set of chromosomes in a species or in an individual organism.

B chromosomes have a functional effect on sex determination in a species of cichlid fishes from Lake Victoria, according to a study by Japanese researchers. The researchers found sex-ratio ...

In about 15% of the animal and plant species, the karyotype of some individuals contains one or more chromosomes in excess of the basic set (Bukeboom, 1994). The properties of these supernumerary ...