 As humans migrated out of Africa, they all carried a genetic feature on the Y chromosome known as M168 (Haplogroup CT (Y-DNA)).The first wave of migration out of Africa stayed close to the oceans shores, tracing a band along the coastal areas of the Indian Ocean including parts of the Arabian Peninsula, the Middle East, the Indian subcontinent and into South East Asia, down into what is now Indonesia, and eventually reaching Australia.This branch of the human family developed a new marker M130 (Haplogroup C (Y-DNA)).