Meiotic behavior of B- chromosomes in the grasshopper Omocestus burri: A case of drive in females

Santos, JLD, A. L.; Fernandez, A.; Diez, M.,  Hereditas,  118:139-143. 1993.

The meiotic behaviour of an iso-B chromosome of the grasshopper Omocestus burri has been studied in a natural population located at Villar del Cobo (Teruel, Spain) by means of cytological observations of male and female meiosis. Whereas B chromosomes do not accumulate in the male germ line, they are included in the secondary oocyte at an increased frequency over mendelian expectations. Therefore, an accumulation mechanism of the accessory chromosome based on meiotic drive takes place in the females of this species.