Washington June 7 (ANI): Researchers have figured out where birds’ penises have gone. It turns out that land fowl which have only rudimentary penises as adults have normally developing penises as early embryos. Later in development however the birds turn on a genetic program that leads their budding penises to stop growing and then wither away. ‘Regulation of the balance between cell proliferation and cell death is essential for controlled growth and development’ Martin Cohn of the Howard Hughes Medical Institute and University of Florida Gainesville said. ‘Too much cell division or too little cell death can lead to overgrowth
