Can you explain ancestors please?

Ancestors are a concept in troll society that are responsible for contributing a greater proportion of their descendant’s genes than the incestuous slurry from which troll eggs are produced. They share their descendant’s signs, horn shape, and blood color. High bloods tend to put more stock in their ancestor’s existence while low bloods don’t usually care about them too much. Because of the reproduction process of trolls, ancestors are usually long dead before their descendant hatches. However, they may still be alive if they’re a long lived caste.