Parthenogenesis is a form of asexual reproduction where an egg develops into an individual without being fertilized by a sperm. This means that the offspring is genetically identical to the parent. This process occurs naturally in some plants and animals, especially certain insects, some fish, amphibians, and reptiles.
In chickens, parthenogenesis is extremely rare and usually results in non-viable eggs. While there have been documented cases of unfertilized chicken eggs beginning development, the embryos typically don't survive. So, while parthenogenesis is a biological phenomenon that can technically occur in chickens, it's not a viable method of reproduction for them.