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. Such inbred strains are therefore isogenic (genetically identical).
Dictionaries - King James Dictionary - Sup. Sup. To dine; to make a meal. Behold, I stand at the door, and knock: if any man hear my voice, and open the door, I will come in to him, and will SUP with him, and he with me.
verb (used without object), supped, supping. 1. to eat the evening meal; have supper. verb (used with object), supped, supping. 2. to provide with or entertain at supper. Origin of sup1. Middle English.