Scientists around the country are investigating several possible causes of Colony Collapse Disorder, including pesticides, viruses, genetically modified crops and even cell phones. One West Virginia University said he is certain that at least 70 percent of the CCD is caused by tiny mites, roughly the size of a sesame seed, and the pathogens they carry.
On website Lauren replied: "...Your information is very accurate, except that unfertilized eggs develop into drones without any additional fertilization. This means that male bees (drones) have half the number of chromosomes that female bees (queens and workers) do, which leads to lots of interesting behaviors.":