We review knowledge about the roles of sex chromosomes in vertebrate hybridization and
speciation, exploring a gradient of divergences with increasing reproductive isolation …

Genome stability is a crucial feature of eukaryotic organisms because its alteration
drastically affects the normal development and survival of cells and the organism as a …

The rate of somatic development of anuran amphibians is only roughly correlated with the
rate of gonad differentiation and varies among species. The somatic stage of a tadpole often …

Most eukaryotes maintain the stability of their cellular genome sizes to ensure genome
transmission to offspring through sexual reproduction. However, some alter their genome …

Hybridogenesis is a hemiclonal reproductive strategy in diploid and triploid hybrids. Our
study model is a frog P. esculentus (diploid RL and triploids RLL and RRL), a natural hybrid …

Globalization and increasing human impact on natural aquatic systems have facilitated the
movement of species and the establishment of nonindigenous species enhancing …

Hybridization and polyploidy play an important role in animal speciation. European water
frogs of the Pelophylax esculentus complex demonstrate unusual genetic phenomena …

Incompatibilities between parental genomes decrease viability of interspecific hybrids;
however, deviations from canonical gametogenesis such as genome endoreplication and …

Many closely related species are capable of mating to produce hybrid offspring, which are
usually sterile. Nevertheless, altering the gametogenesis of hybrid offspring can rescue …

Anatomy: Ovaries in anuran amphibians are paired organs lying on the ventral side of the
kidneys. In adult females ovaries are much bigger than kidneys, because they are filled with …