#1. Half-male and half-female chicken do exist.
Gynandromorphous is the term you are looking for, and this success was created for only one out of every 10,000 chickens. Exciting thing is that the scientists anticipated to find a mutation of some kind, but instead came across chicken that are half-male and half-female, with completely different framework on two sections of the individual body, such as the distinction in physique, plumage and muscular framework. According to the physicians, this might bring us to some interesting results about individual health in the long run, but can also provide understanding in how birds develop.