<unk>  (the adjective is<unk> ry) is the transfer of characteristics from parent to offspring through their genes, or the transfer of a title, style or social status through the social convention known as inheritance (for example, a<unk> ry Title may be passed down according to relevant customs and/or laws).
It was apparent to ancient humans that offsprings resembled their parents.  For example, Genesis 30-46 tells how Jacob and Labans split their sheep into white and speckled varieties so they could distinguish the two to ensure none were later stolen.  Although it was clear that traits were<unk> ry, the precise mechanism of<unk>  was not clear.
Heredity
Sexual dimorphism
Abnormality 
Disease
Delayed milestone
Boil pathophysiology
Moral hazard
Hysteresivity