Editing LeviathanTempest:ChapterTwo (section)

===='''Genetics'''====
The heritage of Tannin favours direct descent. Father to son, mother to daughter. The Tanninim do not favour the sometimes bizarre leaps through cousins or nephews sometimes seen in other Strains. Age seems to play a part, with the first-born being the most likely to inherit, the second-born being second most likely and continuing down the chain. Gender also plays a part, with the current carrier more likely to pass the birthright to a child of his or her own gender. Even parental favouritism plays a part. Since who exactly is carrying the heritage in the many generations without a Leviathan is essentially unknowable the Tanninim are only rarely aware of their tendency towards direct descent. 

When a Tanninim claims his birthright he usually does so alone. In the rare case that two or more Tanninim are born they will be immediate relatives: Two brothers, a mother and daughter or something along those lines. What's more, there will be a clear chain of authority between the two. It might be that one was older, or that one one was the parental favourite and the other was the least liked, or just that one is more popular in school. Even when it doesn’t make sense they both know instinctively who is in charge and why. Whether they accept these instincts is another question, but in these early days when genetics and not choice govern which aspects of the Tribe's powers they hold, the lesser of the two would be strongly advised to avoid direct confrontation. Tanninim have one other unique trait, up to several months before they begin to develop their powers a Tanninim develops one minor trait such as eye colour or a small verbal tic that is identical to their most recent Leviathan ancestor. Any who knew that ancestor personally might recognise this trait as an early warning of a new Leviathan to be, other Tanninim, Gibborim – or the ancestor himself if he still lives – find this especially easy. To them it's instinct.