Boy/Girl Robots

Hello Readers! Do you think artificial intelligence will become so advanced that robots capable of human-like emotion will be developed? I do, and I think it is only natural that such robots be given a humanoid form (two legs, two arms, etc.). Still, I can't help wondering if these robots will be assigned a particular gender... How will one be able to distinguish a boy robot from a girl robot? Will they wear gender tags? Will their "robot figure" allow them to be identified? Perhaps their behavior should be used to characterize them as being more male-like or female-like.