1 The grass Festuca ovina is an important constituent of the species-rich `alvar' grasslands on the Baltic island of Oland. Levels of allozyme polymorphism are high and variation is known to be ...

We have studied 28 gene loci coding for enzymes and other soluble proteins in a sample of several hundred Drosophila subobscura collected in Fruška gora, Yugoslavia. On the average, the proportion of ...

Hybrid zones can be regarded as natural filters for the identification of genes that distinguish closely related populations or species (Barton and Bengtsson, 1986; Arnold, 1997; Martinsen et al., ...

The human genome contains an estimated 11 million common single nucleotide changes with allele frequencies greater than 1%. 1 A vast majority of these sequence variations are believed to be ...