1. Department of Genetics; Comenius University in Bratislava, Faculty of Natural Sciences, Mlynská dolina B-1, Ilkovičova 6; Bratislava 84215 Slovakia
2. Department of Didactics in Science, Psychology and Pedagogy; Comenius University in Bratislava, Faculty of Natural Sciences, Mlynská dolina CH-2, Ilkovičova 6; Bratislava 84215 Slovakia