Gene chain
From Tardis Wiki, the free Doctor Who reference
A gene chain was a common DNA pattern shared by relatives, such as a father and son.
Restac and Alaya belonged to the same gene chain. (TV: Cold Blood)
The Silurians once employed control systems that required two operators with the same gene chain. This forced Rory Williams and his father Brian to pilot the ark to escape a missile barrage. (TV: Dinosaurs on a Spaceship)
