Mitochondrial DNA can live 15 generations. 15 generations of living mitochondria live inside you. Your 15 generation grandparents living cells are in you. A mutant mtDNA will drift to fixation in a human matrilineal in 15 generations. Recently an attempt was made to estimate the age of the human race using mitochondrial DNA.
This material is inherited always from mother to children only. By measuring the difference in mitochondrial DNA among many individuals, the age of the common maternal ancestor of humanity was estimated at about 200,000 years.
It remains implausible to explain the known geographic distribution of mtDNA sequence variation by human migration that occurred only in the last 6,500 years.
Mitochondrial DNA (mtDNA) (by virtue of its maternal, non recombining mode of inheritance, rapid pace of evolution, and extensive intraspecific polymorphism) permits and even demands an extension of phylogenetic thinking to the microevolutionary level. Many species exhibit a deep and geographically structured mtDNA phylogenetic history. Study of the relationship between genealogy and geography constitutes a discipline that can be termed intraspecific phylogeography, ’alien genes’ in human DNA
Where did the Rh negatives come from? If they are not the descendants of prehistoric man, could they be the descendants of the ancient astronauts? All animals and other living creatures known to man can breed with any other of their species. Relative size and color makes no difference.
Why does infant's haemolytic disease occur in humans if all humans are the same species? Haemolytic disease is the allergic reaction that occurs when an Rh negative mother is carrying a Rh positive child. Her blood builds up antibodies to destroy an ALIEN substance (the same way it would a virus), thereby destroying the infant. Why would a mother's body reject her own offspring?
Nowhere else in nature does this occur naturally. This same problem does occur in mules - a cross between a horse and donkey. This fact alone points to the distinct possibility of a cross-breeding between two similar but genetically different species.
No one knows where the Rh negative people came from....read more>>...