Figure 1

Neo-sex chromosomes of Muntiacus crinifrons. (a) Paring patterns in male and female black muntjacs during meiosis. The black areas on chromosomes represent homosynapsis regions, whereas gray areas represent heterosynapsis regions. Cross lines between chromosomes represent homologous recombination. A pentavalent involving five chromosomes will form during meiosis of male black muntjacs, whereas such structures are absent in female black muntjac. (b) Inversion on the neo-Y chromosome revealed by fluorescence in situ hybridization using two Indian muntjac bacterial artificial chromosome (BAC) clones, 06G7 (green) and 07B3 (red), as probes.