The Fly 2 (1989)
Like father, like son.
In this sequel to David Cronenberg's 1986 "The Fly" the son of the original Fly is raised in a laboratory under the watchful eye of Bartok, an evil scientist who wants to exploit him. Born encased in an insect sac, by the age of five the junior Fly is a fully grown adult and scientific genius. Before mutating into a horrible insect like his dad, he attempts to complete work on his father's teleportation machine, do away with Bartok, and have a love affair with a female research scientist.