Are ‘Mitochondrial Eve’ and ‘Y-Chromosomal Adam’ …
This suggests (though it doesnot prove) that Neanderthals went extinct without contributing to the gene poolof any modern humans.
Final noteThere are many variables that can affect the mutation rate of mtDNA, includingeven the possibility that mtDNA is not always inherited strictly through maternallines.
The Mitochondrial Clock: Is the clock speed faster than …
“That woman, Mitochondrial Eve, transmitted her mtDNA sequence to her offspring, and over generations slight variations in sequence occurred and accumulated, leading to the diversity of existent sequences in men and women populating the earth today.”
Ancestral Adam was found in 1995, when a separate study on male ancestry examined the Y-chromosome, passed directly from father to son. Science published the results of a study in which a segment of the Y-chromosome from 38 men from different ethnic groups were analyzed for variation.
ActionBioscience - promoting bioscience literacy
Prevalent stereotypes (and ignorant authors outside Italy) sometimes paint asuperficial physical picture of Sicilians which bears little similarity toreality. While individuals having extremely light blonde hair represent only asmall part of the Sicilian population, many Sicilians have blue or green eyes andlight complexions (and red hair). In Sicily the range of complexions, fromcream to olive, is striking, and combinations are interesting --blue-eyed darkbrunettes and brown-eyed strawberry blonds. Moreover, the idea that northernItalians are overwhelmingly "lighter" than southerners is statisticallyinaccurate. Anybody who spends even a few weeks travelling the country couldplainly observe this. Let's remember, of course, that superficial physical traitsare only a tiny part of an individual's genetic profile. Sicily, more than mostother parts of Italy, has had a particularly wide influx of"immigrants" over the centuries, creating a greater genetic diversitythan one might find in some other regions of Europe.
Recent African origin of modern humans - Wikipedia
Knowing this, the researchers were able to determine that every human being alive today can trace their ancestry back to a single woman now referred to as “Mitochondrial Eve.” The original research placed Eve somewhere in East Africa between 140,000 and 200,000 years ago. More recent research suggests she may have lived less than 100,000 years ago.
Paternal Inheritance of Mitochondrial DNA — NEJM
Sicilian history and ethnology are well documented. Not surprisingly, geneticstudies of the Sicilian population for the ancient and medieval periods generallyconfirm what is known historically. As genetic conclusions are keyed togenerations rather than years, historical knowledge sometimes helps to placegenetic developments in their proper context. For example, the prevalence ofmultiple sclerosis in Enna and Monreale may be attributed to genes brought withthe Normans, while diseases of the thalassemia group may have arrived withPhoenician, Greek or Arab peoples. Certain superficial physical traits probablywere widely introduced by specific groups --blue eyes by Normans and Longobards,kinky hair by Arabs, and so forth. That said, apart from avoidance of"inbreeding," the most important aspect of any migration andamalgamation is usually cultural rather than physical. We've come to accept thatmost Vikings had blue eyes, but would their achievements be attenuated if theNorsemen were all brown-eyed?
The Woman Who is the "Mother" of Us All - Today I …
Two responses to this complexity are possible. It could be concluded that archaeological data should not be used phylogenetically, and that the discordant morphological-technological associations are the real clue to the functional plasticity of archaeological assemblages. Such an attitude, however, would assume that all the concordant associations, which are the majority, are coincidental or without meaning. The second possibility is to search for different underlying patterns to the biological-technological relationship, and thus for alternative evolutionary hypotheses.