Krüppel

Krüppel is a gap gene which encodes a zinc finger protein with four tandemly repeated zinc finger domains.[1]

Put into English, it actually controls the development of a zygote early on in its growth, causing a gap in the otherwise heterogenous arrangement of cells. It also controls access to several other subsequent genes, imposing order on the developing embryo. Krüppel means, literally, "cripple" in German.