Dichroplus grasshopper 12 Acrididae 10 Animals 10 Grasshoppers 10 Chromosomes 8 Male 8 Melanoplinae 8 article 8 nonhuman 8 Argentina 6 Robertsonia 6 karyotype 6 male 6 Animalia 4 Chromosome Pairing 4 Crossing Over, Genetic 4 Dichroplus elongatus 4 Dichroplus pratensis 4 Heterozygote 4 Homozygote 4 Invertebrata 4 Karyotyping 4 Meiosis 4 Metaphase 4 Orthoptera 4 Polymorphism, Genetic 4 Robertsonian chromosome translocation 4 Testis 4 animal experiment 4