Abstract
Frequency of chiasmata was studied in male and female full-sibs belonging to nine genetically different families from the grasshopper Eyprepocnemis plorans. Mean cell chiasma frequency was always higher in spermatocytes than in oocytes. Furthermore, a positive correlation between both parameters in the families studied was observed. It is concluded that chiasma formation in both sexes is under a single genetic controlling system, chiasma sex differences being a reflection of a differential response of such control to the differing conditions of spermatocytes and oocytes.
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Santos, J., Cano, M. Evidence of a joint control of chiasma formation in spermatocytes and oocytes of a grasshopper. Heredity 65, 419–422 (1990). https://doi.org/10.1038/hdy.1990.112
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DOI: https://doi.org/10.1038/hdy.1990.112