(1) Genetic recombination is absent and no chiasmata are formed in bivalents.(2) First, it generates crossovers between homologous chromosomes that mature into visible chiasmata .(3) However, the observed differences may be conditional on the chromosomal location of the chiasmata .(4) A given factor s can affect the recombination rate r through a change in the number of chiasmata occurring during meiosis.(5) During meiosis, homologous chromosomes become physically connected by the formation of chiasmata .
