Mitochondrial DNA and human evolution
All these mitochondrial DMAs stem from one woman who is postulated to have lived about 200,000 years ago, probably in Africa, implying that each area was colonised repeatedly.
Mitochondrial DNA and two perspectives on evolutionary genetics
This essay reviews comparative studies of animal mitochondrial DNA (mtDNA), with emphasis on findings made and ideas developed at Berkeley. It argues that such studies are bringing together two…
Monophyletic origin of Lake Victoria cichlid fishes suggested by mitochondrial DNA sequences
This work sequenced up to 803 base pairs of mitochondrial DNA from 14 representative Victorian species and 23 additional African species to study the 'flock' of cichlid fishes in Lake Victoria.
Mitochondrial DNA sequences of primates: Tempo and mode of evolution
Genealogical analysis of the sequence differences supports the view that the human lineage branched off only slightly before the gorilla and chimpanzee lineages diverged and strengthens the hypothesis that humans are more related to gorillas and chimpanzees than is the orangutan.
Evolution of the cytochromeb gene of mammals
Comparisons of these cytochromeb sequences support current structure-function models for this membrane-spanning protein, including that part of the outer surface which includes the Qo redox center is more constrained than the remainder of the molecule, namely, the transmembrane segments and the surface that protrudes into the mitochondrial matrix.
Calibration of mitochondrial DNA evolution in geese
Fossil evidence suggests that these two groups of geese had a common ancestor 4–5 million years ago, and the mean rate of sequence divergence in goose mitochondiral DNA is not far from 2% per million years, the value in mammals.
Evolution in bacteria: Evidence for a universal substitution rate in cellular genomes
A temporal scale for bacterial evolution is constructed by tying ecological events that took place at known times in the geological past to specific branch points in the genealogical tree relating the 16S ribosomal RNAs of eubacteria, mitochondria, and chloroplasts to specific branches in the bacterial tree.
DNA sequences from the quagga, an extinct member of the horse family
Dried muscle from a museum specimen of the quagga, a zebra-like species that became extinct in 1883, is examined, and DNA was extracted in amounts approaching 1% of that expected from fresh muscle, and that the DNA was of relatively low molecular weight.
Paternal inheritance of mitochondrial DNA in mice
Paternally inherited mtDNA molecules have now been detected in mice at a frequency of 10−4, relative to the maternal contributions, which provides a mechanism for generating heteroplasmy and may explain mitochondrial disorders exhibiting biparental transmission.
Mitochondrial resolution of a deep branch in the genealogical tree for perching birds
- S. Edwards, P. Arctander, A. Wilson
- BiologyProceedings of the Royal Society of London…
- 22 February 1991
The mitochondrial tree shows broad concordance with that based on hybridization of nuclear DNA; however, parsimony and maximum likelihood methods suggest a close kinship between thrushes and Australian babblers, in agreement with the traditional morphological classification.