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These separate languages had completed the transition from animals to man, and, under the influence of each main branch of languages, humans had evolved as separate species, which could be subdivided into races. Haeckel divided human beings into ten races, of which the Caucasian was the highest and the primitives were doomed to extinction. [74]
Rooted phylogenetic tree optimized for blind people. The lowest point of the tree is the root, which symbolizes the universal common ancestor to all living beings. The tree branches out into three main groups: Bacteria (left branch, letters a to i), Archea (middle branch, letters j to p) and Eukaryota (right branch, letters q to z).
Although Southeast Asia has been proposed as the origin for all non-African human Y chromosomes, [4] this hypothesis is considered unlikely. [5] Other bottlenecks occurred roughly 50,000 and 5,000 years ago, and the majority of Eurasian men are believed to be descended from four ancestors who lived 50,000 years ago, all of whom were descendants ...
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Haplogroup E1a is split into two main branches: E1a1 (E-M44) which has been mostly found in Europe, West Asia and among Ashkenazi Jews; and E1a2 (E-Z958) which has been exclusively identified in Sub-Saharan Africa. [17] Haplogroup E-M2 is the most prevalent subclade of E in Sub-Saharan Africa and is strongly associated with expansion of Bantu ...
Branch migration is the second step of genetic recombination, following the exchange of two single strands of DNA between two homologous chromosomes. [2] The process is random, and the branch point can be displaced in either direction on the strand, influencing the degree of which the genetic material is exchanged. [ 1 ]
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The Ust'-Ishim man fossil of Siberia, dated ca. 45,000 years old, belongs to haplogroup R* (formerly classified as U*). [9] [10]Haplogroup R has also been observed among Egyptian mummies excavated at the Abusir el-Meleq archaeological site in Northern Egypt, which date from the Pre-Ptolemaic/late New Kingdom, Ptolemaic, and Roman periods.