chromosome analysis article 54 nonhuman 54 Animals 38 Argentina 38 controlled study 36 Male 32 male 32 genetics 26 meiosis 24 Female 22 Meiosis 22 animal 22 chromosome number 22 female 22 Karyotyping 20 priority journal 20 karyotype 18 fluorescence in situ hybridization 16 human 16 karyotyping 16 Cytogenetic Analysis 14 animal cell 14 cytogenetics 14 genetic variability 14 heterochromatin 14 mitosis 14 sex chromosome 14 Article 12 In Situ Hybridization, Fluorescence 12