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.
Supplementary Assessment and Course Management. Supplementary assessment (SUP) is to be made available for any course, in which the student receives a grade of 3, unless the course requirements preclude supplementary assessment.