This behavior produces an acoustic signal, the love song, which is perceived through the female's antennae. Accordingly, she consents. Although she may have little choice in the matter since it has been suggested that the net air movement produced by wing flapping may stop the female from walking away. At the heart of all this is a protein termed the period circadian protein or clock protein. This particular clock protein is involved in the generation of biological rhythms in Drosophila .
Biological rhythms are quite an issue and have been widely studied in all kinds of organisms.
These rhythms can be of paramount importance. If a flower does not open when an insect is around, it may well miss its chance to be pollinated. Imagine Drosophila flapping its wings in the absence of a female. The clock protein is part of Drosophila 's internal biological clock. It has a role in the pupal eclosion rhythm and the adult's locomotor activity, implying that a single clock system controls both.