Fig. 1From: Is premeiotic genome elimination an exclusive mechanism for hemiclonal reproduction in hybrid males of the genus Pelophylax?Comparative genomic hybridization (CGH) in mitotic and meiotic chromosomes of four water frog Pelophylax esculentus males. M1 (a), M2 (b-d), M3 (e-g, j) and M4 (h, i). CGH clearly distinguished chromosomes of the parental species, P. ridibundus (red) and P. lessonae (green). a Mitotic prometaphase. b Haploid mitotic metaphase after elimination of the ridibundus genome. c Diplotene. d Meiotic metaphase I. e, f, g, h Late meiotic prophase I. i, j Meiotic metaphase I showing bivalent-like configurations and univalents. Solid arrowheads indicate the smallest submetacentric chromosome pair with marked ridibundus-specific repetitive DNA in the lessonae-derived chromosome set, arrows indicate bivalent-like configurations between two different parental genomes, open arrowheads indicate bivalent-like configurations within one parental genome, asterisks indicate univalents. Scale bars equal 10 μmBack to article page