Cytogenetic studies of the primate Y chromosomes have suggested that extensive rearrangements have occurred during evolution of the great apes .
cytogenetic studies of the primate y chromosomes have suggested that extensive rearrangements have occurred during evolution of the great apes .
B-other_name I-other_name O O B-DNA_molecule B-DNA_molecule I-DNA_molecule O O O O O O O O O O O B-multi_cell I-multi_cell O