[Crossing over in the oogenesis of Gallus gallus domesticus chickens: periodicity in the distribution of chiasmata over the length of chromosomes].

The periodic occurrence of chiasmata was studied in lampbrush chromosomes of the chicken (Gallus gallus domesticus). It was shown that the most probable interference distance in chicken macrobivalents 1-3 corresponded to 24.48 Mb. The distance at which absolute interference is observed in chicken macrochromosomes varies from 5.75 to 9.02 Mb.