Population Genetics in the American Tropics. I. Concealed Recessives in Different Bioclimatic Regions

Mini-opinion From unicellularity to multicellularity - molecular speculations about early animal evolution

“…In time the give-and-take of genes switching between the molecular parasite and those of the host had to gradually respond to a selection process, while allowing for a certain reduction of fitness. Even between drastic genes of the genetic load, different alleles that guide to the same adaptive response (similar to the ping-pong game we just referred to) have been repeatedly found, through the analysis of population genetics of wild strains of Drosophila melanogaster, to have adaptive features (survival) resulting from a switching between those genes that permit semi-lethality and sub-vitality without causing mortality to those that caused near-normal viability (Hoenigsberg and Navas, 1965;Hoenigsberg et al, 1968Hoenigsberg et al, , 1969aHoenigsberg et al, ,b, 1973.…”

Population Genetics in the American Tropics. X. Genetic Load Differences in Drosophila willistoni from Colombia

“…The total variance, environmental, sampling, and genetic components of each population are shown in Table 4. The method used has been described (e.g., Wallace and Madden, 1953;Hoenigsberg and de Navas, 1965). The total variance Tables 2 and 3 we can construct Table 5.…”

O-chromosome lethal frequencies in Serbian and Montenegrin Drosophila subobscura populations

“…In the case of lethal chromosomes, it has been accepted that D. willistoni has lower frequencies in marginal than in central populations [32], but this conclusion is not clear cut [37]. In D. melanogaster, some geographical variation was found, but with different interpretations [7,[38][39][40]. However, no differentiation among popu lations was observed in D. prosaltans [41].…”