Bill Graham, the acid-tongued concert promoter who championed rock acts during San Francisco's psychedelic era and went on to play a leading role in pop music's emergence as a cultural force, died late Friday when a helicopter carrying him and two associates crashed into an electrical utility tower near Vallejo.
People born with diphallia rarely have two fully functioning penises, like DDD. Often times, the condition is accompanied by a plethora of other medical problems, along with a higher risk of spina bifida.
So when one egg is fertilized by single sperm then identical twins or mono zygotic are born and they are always of same sex. But when two different eggs are fertilized by two different sperms then fraternal twins are born. In fraternal twins sex of both twin are irrespective of each other .