APID changes in the genetic composition occlir in populations of DroR sophila pseudoobscura which inhabit certain localities on Mount San Jacinto, California (DOBZHANSKY 1943). These changes are cyclic and connected with the succession of the year's seasons. The genetic variable involved is the gene arrangement in the third chromosome. Three gene arrangements are common among the third chromoso...

Anopheles funestus Giles is one of the most important vectors of malaria in sub-Saharan Africa. The population structure of this mosquito in Burkina Faso, West Africa based on chromosomal inversion data led to the description of two chromosomal forms, Kiribina and Folonzo. Because both forms co-occur in the same locales yet differ significantly, both in the frequency of inverted arrangements on...

D R O S O P H I L A fivopilosa Frey is a neotropical species thet, LI Chile, is found only associated with flowers of the solanaceous plant, Cestrum parqui L’Her, which is common all over the central part of the country during practically every season of the year. As the whole developmental cycle takes place within these flowers, it is relatively easy to establish some basic ecological paramete...

Most natural populations of Drosophila pseudoobscura are mixtures of individuals homozygous and heterozygous for gene arrangements in the third chromosome. The relative frequencies of the gene arrangements in populations show geographical and temporal variations. On Mount San Jacinto and in the Sierra Kevada in California, and in some localities in Texas, the temporal variations are cyclic and ...

in this study, chromosome analyses were performed on 70 infertile azoospermic and oligospermic (<20 million/ml) men, and also cultures of peripheral blood lymphocytes by high resolution banding method were analysed as well. it is revealed 8 (11.43 percent) men with chromosomal abnormality. there were 31.4 percent patients with azoospermia and 68.6 percent with oligospermia from several thousand...

INCE natural selection acts on phenotypes, it must “aim” at the genetic material via fitness traits, traits affecting number, quality, or fertility of progeny; thus genetic material is altered to bring about changes in developmental, physiological, and behavioral pathways leading to maximization of fitness. If we are to understand the adaptive nature of the genetic potential in a population, it...

15 16 Running title: Gene exchange shaping variation 17 Word count (main text): 5709 18 19 2 Gene flow (defined as allele exchange between populations) and gene flux (defined as 20 allele exchange during meiosis in heterokaryotypic females) are important factors 21 decreasing genetic differentiation between populations and inversions. Many 22 chromosomal inversions are under strong selection an...