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The results show that haplogroup D introgressed 37,000 years ago (based on the coalescence age of derived D alleles) into modern humans from an archaic human population that separated 1.1 million years ago (based on the separation time between D and non-D alleles), consistent with the period when Neanderthals and modern humans co-existed and ...
Race is a categorization of humans based on shared physical or social qualities into groups generally viewed as distinct within a given society. [ 1] The term came into common usage during the 16th century, when it was used to refer to groups of various kinds, including those characterized by close kinship relations. [ 2]
Human genetic variation is the genetic differences in and among populations. There may be multiple variants of any given gene in the human population ( alleles ), a situation called polymorphism . No two humans are genetically identical. Even monozygotic twins (who develop from one zygote) have infrequent genetic differences due to mutations ...
The peopling of India refers to the migration of Homo sapiens into the Indian subcontinent. Anatomically modern humans settled India in multiple waves of early migrations, over tens of millennia. [ 1] The first migrants came with the Coastal Migration / Southern Dispersal 65,000 years ago, whereafter complex migrations within South and ...
[5] [6] For the time of speciation of Homo sapiens, some 200,000 years ago, an effective population size of the order of 10,000 to 30,000 individuals has been estimated, with an actual "census population" of early Homo sapiens of roughly 100,000 to 300,000 individuals. [7] Estimates regarding the questions of "how many people have ever lived?"
The adult human brain weighs on average about 1.5 kg (3.3 lb). [ 1] In men the average weight is about 1370 g and in women about 1200 g. [ 2][contradictory] The volume is around 1260 cm 3 in men and 1130 cm 3 in women, although there is substantial individual variation. [ 3] Yet another study argued that adult human brain weight is 1300-1400 g ...
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