She had planned to work with Curt Stern, who had demonstrated crossing-over in Drosophila just weeks after McClintock and Creighton had done so; however, Stern emigrated to the United States.
Planowała pracować z Curtem Sternem, który wykazał crossing-over u muszki owocówki zaledwie kilka tygodni po McClintock i Creighton, jednak Stern wyemigrował do Stanów Zjednoczonych.