Generating Inbred Mice. Inbred Strains. A strain is defined as inbred when it has been mated brother x sister for 20 or more consecutive generations (F20). All offspring can be traced back to a single ancestral breeding pair in the 20th or subsequent generation.
suction head. The energy per unit weight of fluid on the suction side of a pump. 1  Facebook.
I'm not sure what movie you refer to, but generally speaking, a dead head is a follower of the great Jerry Garcia and the Greatful Dead. It can also refer to the act of removing dead blossoms from a plant, but I think in the case you refer to, the former would apply. Have a greatful day. This Site Might Help You.