Polyploidy is the presence of more than two homologous sets of chromosomes in a cell or organism. It occurs as a result of genome duplication due to nondisjunction during meiosis. In the ...

Herpetology is the branch of zoology concerned with the study of amphibians (including frogs, toads, salamanders, newts and the gymnophiona) and reptiles (including snakes, lizards, amphisbaenids ...