The preliminary cytogenetic investigations in Rana ridibunda Pall. and Rana esculenta L. from the north of Moldavia

The cytogenetic investigations in Rana ridibunda (Pall.) and R. esculenta (L.) species pointed out that the two species have the karyotype formed of 13 pairs of chromosomes (2n = 26). The chromosomes of these species can be divided into two groups: the first group comprises the pairs of large chromosomes 1–5, and the second group is made of the pairs 6–13 of smaller chromosomes.