Is it possible that a chicken has 2 gender?

No, it is not possible for a chicken to have two genders. Chickens are sexually dimorphic, meaning that males (roosters) and females (hens) have distinct physical characteristics and reproductive organs.

Roosters have testes and produce sperm, while hens have ovaries and produce eggs. Chickens have a very clear distinction between males and females. There are no hermaphroditic chickens.