Modelling the recent common ancestry of all living humans

@article{Rohde2004ModellingTR,
  title={Modelling the recent common ancestry of all living humans},
  author={Douglas L. T. Rohde and Steve Olson and Joseph T. Chang},
  journal={Nature},
  year={2004},
  volume={431},
  pages={562-566}
}
If a common ancestor of all living humans is defined as an individual who is a genealogical ancestor of all present-day people, the most recent common ancestor (MRCA) for a randomly mating population would have lived in the very recent past. However, the random mating model ignores essential aspects of population substructure, such as the tendency of individuals to choose mates from the same social group, and the relative isolation of geographically separated groups. Here we show that recent… Expand
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References

SHOWING 1-10 OF 53 REFERENCES
RECENT COMMON ANCESTORS OF ALL PRESENT-DAY INDIVIDUALS
Previous study of the time to a common ancestor of all present-day individuals has focused on models in which each individual has just one parent in the previous generation. For example,Expand
On the genealogy of a population of biparental individuals.
TLDR
It is shown that the distribution of the repetitions of ancestors reaches a stationary shape after a small number G( c) approximately log N of generations in the past, that only about 80% of the ancestral population belongs to the tree (due to coalescence of branches), and that two trees for individuals in the same population become identical after G(c)generations have elapsed. Expand
Distribution of repetitions of ancestors in genealogical trees
We calculate the probability distribution of repetitions of ancestors in a genealogical tree for simple neutral models of a closed population with sexual reproduction and non-overlapping generations.Expand
Recent common ancestry of human Y chromosomes: evidence from DNA sequence data.
TLDR
It is estimated that the spread of Y chromosomes out of Africa is much more recent than previously was thought, and the data indicate substantial population growth in the effective number of human Y chromosomes. Expand
Genealogy and subpopulation differentiation under various models of population structure
TLDR
It is seen that FST can depend strongly on the mutation rate, for example in the case of an essentially one-dimensional habitat with many subpopulations where gene flow is restricted to neighbouring subpopulation. Expand
Archeology, population genetics and studies of human racial ancestry.
TLDR
It is shown that the probable demographic nature of Pleistocene populations has obscured genetic distances to such an extent that they cannot be used to discriminate between the two viewpoints of racial origins, so that the authors presently do not have a scientifically valid understanding ofracial origins. Expand
On the number of ancestors to a DNA sequence.
TLDR
The distribution of ancestral material to an extant chromosome is here investigated by the coalescent with recombination, and the results are discussed relative to humans. Expand
Anthropological Genetics of Small Populations
Anthropological genetics encompasses a wide spectrum of interests centered on the explanation of genetic variation in human populations. The methods and theories of anthropological genetics areExpand
Mitochondrial genome variation and the origin of modern humans
TLDR
The global mtDNA diversity in humans is described based on analyses of the complete mtDNA sequence of 53 humans of diverse origins, providing a concurrent view on human evolution with respect to the age of modern humans. Expand
Maternal and Paternal Lineages of the Samaritan Isolate: Mutation Rates and Time to Most Recent Common Male Ancestor
TLDR
The haplotypes identified in Samaritan paternal lineages that belong to the same haplogroup were used to estimate the number of generations elapsed since their most recent common ancestor (MRCA), and the estimate of 80 generations corresponds with accepted traditions of the origin of this sect. Expand
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