| Popis: |
The populations of Drosophila funebris which inhabit the central part of the city of Moscow contain 88.1 per cent. of inversion heterozygotes; the populations of the less centrally located parts of the city 55.5 per cent., those of the margins of the city 12.1 per cent., of the suburban villages 1.8 per cent., while in the country from 200 to 500 kilometers north of Moscow no inversion heterozygotes at all have been found. High concentrations of inversion heterozygotes have been observed in other cities as well (Saratov, 53.9 per cent., Ivanovo 37.2 per cent., Erivan 21.2 per cent.), while in small towns, in a city exceptionally rich in gardens (Alma Ata), and in a city devastated by the war (Voronezh) the concentrations of inversion heterozygotes are low. While the overall frequencies of inversion heterozygotes are, thus, connected with the degree of industrialization of the locality, some inversions are relatively more frequent in the North while others are relatively more common in the South. These qua... |
