Homologous chromosomes pair together to form a the process of pairing homologous chromosomes is in each bivalent. there would be a total of centromeres.. in a bivalent, you should be able to sister chromatids.. a physical exchange of material between two homologus chromosomes is the visible evidence that exchange of genetic material has occuredis called a . the answer choices are: . chiasma. two. one. eight four. bivalent. crossing over. synapsis. centromere. cytokinesis