This phenomenon occurs when two sperm fertilise a single egg, resulting in a mixture of male and female cells in the developing embryo ...

A female may choose a male from several ... It might be ornate peacock plumage, large antlers on a deer, or a bird's particularly melodious mating call. Another type of sexual selection is combat ...

The peacock, India's national bird, is a stunning symbol of beauty ... On the other hand, the female peahen is more reserved ...