Steve Neale says that a genre is constructed through repetition, but are also marked by change. Over time, genres can change and develop, and possibly overlap with others. These genres exist within specific contexts.
Humans falls well in the Sci-Fi Genre. this genre has been popular for nearly a century, with early works focusing on the extraterrestrial and the unthinkable. The genre has been described as portraying ‘parents mistakes’, meaning different choices our previous generation made. The genre also focuses on fixing these mistakes. Most importantly, Science Fiction has a tendency to focus on relevant problems in the real world, with one example being ‘invasion of the body snatchers’, which has themes of conformoty in a post cold-war world.
Humans follows the format of modern worries and problems, namely artificial intelligence and how we use it in our homes (e.g. Alexa devices). Humans does dramatize the problem like most TV shows do and exaggerate the problem at hand by making the AI into a life-like synthetic. There are also different tropes that Humans follows for it to be considered Sci-Fi. The music is very synth heavy, the color pallete of the synths uniform is that Of a grey/blue and the language used in the show is tech savvy at times (GPU, clock speed, etc).
However, the show does borrow from different genres, namely the soap/drama genre. The show has a very UK, low budget feel that reinforces its aesthetic as soap-like. there are also many branching stories that involve multiple, seemingly unrelated groups of characters. Humans borrows from Drama with its use of character development and arcs that allow the viewer to connect with the character on a personal level. This trope is not usually found in generic Sci-Fi.