@Zumaale
@Jabuutawi
@Jugjugwacwac
This is good news for the ocean of Beelweeynta Dir Irir Samaale.
The only bad news is, they still have no idea how T got into Africa, exactly. So, T, left the Zagros Mountains in the Neolithic, but how it reached the Horn. God knows. There are two main opinions for geneticists, the Egyptian route and the Arabian Peninsula route. But the confusion comes in when there is a minor presence of T in the Peninsula and also the corridor between Egypt and Somalia. We, may, never know.
http://www.eupedia.com/europe/Haplogroup_T_Y-DNA.shtmlThe higher frequency of T in East Africa would be due to a founder effectamong Neolithic farmers or pastoralists from the Middle East. One theory is that haplogroup T spread alongside J1 as herder-hunters in the Pre-Pottery Neolithic period, leaving the Zagros mountains between 9,000 and 10,000 BCE, reaching the Egypt and the southern Arabian peninsula around 7,000 BCE, then propagating from there to the Horn of Africa, and later on to Madagascar. However, considering that J1 peaks in Yemen and Sudan, while T1 is most common in southern Egypt, Eritrea and Somalia, the two may not necessarily have spread together. They might instead have spread as separate nomadic tribes of herders who colonised the Red Sea region during the Neolithic, a period than spanned over several millennia. Nevertheless both are found in all the Arabian peninsula, all the way from Egypt to Somalia, and in Madagascar. This contrasts with other Near Eastern haplogroups like G2a and J2, which are conspicuously absent from East Africa, and rare in the Arabian peninsula. Nowadays, T1a subclades dating from the Neolithic found in East Africa include Y16247 (downstream of CTS2214) and Y16897. Other subclades dating from the Bronze Age (see below) are present as well, such as Y15711 and Y21004, both downstream of CTS2214.
