Final answer:
Unilineages are found in societies with unilineal descent, where kinship follows either a patrilineal or a matrilineal line, depending on cultural practices.
Step-by-step explanation:
Unilineages would be expected in societies that follow the unilineal descent principle, where kinship is traced through a single gendered line. This principle manifests in three forms: patrilineal descent, tracing descent through male ancestors; matrilineal descent, tracing descent through female ancestors; or ambilineal descent, which may follow the line of either the mother or the father, depending on the situation. Patrilineal descent systems are common in rural parts of China and India, where the family surname and legacy continue through the male line, while in matrilineal societies, the lineage is continued through female ancestors.