Scientists study fly semen to unlock genetic mysteries
FLIES and their sexual habits may provide a key to discovering if genetics are the only things driving what offspring look like.
A study by the University of New South Wales has found that the size of the young of flies was determined by the mother's previous sexual partner, rather than the sire of the offspring.
It has lent some credence to the ancient Greek idea of "telegony", which was largely discredited as genetics came to the fore in scientific thinking.
Researchers said they did not know whether "non-genetic inheritance" may be applicable to other species, but the findings raise questions about how some traits are inherited.