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Moroccan Genetics
Moroccan genetics encompasses the genetic history of the people of Morocco, and the genetic influence of this ancestry on world populations. It has been heavily influenced by geography. In prehistoric times, the Sahara desert to the south and the Mediterranean Sea to the north were important geographical barriers. West Asia and Northeast Africa form a single land mass at the Suez. West Asian populations would have also been attracted to a wet Sahara, arriving either through the Suez, the Bab el-Mandeb or the Mediterranean. As a result of these geographic influences, the genetic profile of the Moroccan population is a complex mosaic of autochthonous Maghrebi lineages, as well as Northeast African, European, West Asian and West African elements in variable degrees. Though Northwest Africa has experienced gene flow from the surrounding regions, it has also undergone long periods of genetic isolation in some parts. This has allowed distinctive genetic markers to evolve in some M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Human Y-chromosome DNA Haplogroups (percentages)
In human genetics, a human Y-chromosome DNA haplogroup is a haplogroup defined by mutations in the non- recombining portions of DNA from the male-specific Y chromosome (called Y-DNA). Many people within a haplogroup share similar numbers of short tandem repeats (STRs) and types of mutations called single-nucleotide polymorphisms (SNPs). The human Y-chromosome accumulates roughly two mutations per generation. "one mutation in every 30 million base pairs" Y-DNA haplogroups represent major branches of the Y-chromosome phylogenetic tree that share hundreds or even thousands of mutations unique to each haplogroup. The Y-chromosomal most recent common ancestor (Y-MRCA, informally known as Y-chromosomal Adam) is the most recent common ancestor (MRCA) from whom all currently living humans are descended patrilineally. Y-chromosomal Adam is estimated to have lived roughly 236,000 years ago in Africa. By examining other bottlenecks most Eurasian men (men from populations outside of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
