Are there both male and female ants in a colony of workers? 

No. All worker ants are females. The male ants are only present when mating occurs. They mate with the queens and die soon after mating.

How do ants communicate?

 Ants communicate primarily through their sense of smell. They emit chemical signals called pheromones which communicate specific information to other ants. The ants will pick up on the chemicals with their antennae which will tell them where the signal is coming from and how strong it is. Some ants can also communicate using sound by rubbing certain parts of their bodies together much like a cricket creates noises with its legs. This is called stridulation.

How do ant colonies work?

While each ant shows signs of distinct behavior, the ants themselves should not be thought of as individuals. Rather, an ant colony is like one large organism with many different functioning parts. Each ant has a set of duties that it will perform for its entire life.

Ants can have wings? How and why?

Yes. Ants are related to wasps and these wings come from their wasp ancestors.  Alates are winged queen and male ants. With specific outdoors cues (weather, air pressure, pheromones from other colonies, etc) a queen will produce Alates. The alates often fly far from the nest to breed, which helps mix the genepool up and keeps the rate of sibling alates mating with each other low.