The two major forms of a unilineal descent group, whether matrilineal or patrilineal, are the _______________ and the _______________.​

Major Forms

Principal or most significant types, categories, or variants of a particular subject or entity.

Matrilineal

A societal system in which lineage, inheritance, and social affiliation are traced through the mother's line.

Patrilineal

Relating to a societal system where lineage, inheritance, and social identity are primarily traced through the father's line.