Mitochondrial Eve Quotes

However, there is a way to know for certain that Noah’s Flood and the Creation story never happened: by looking at our mitochondrial DNA (mtDNA).  Mitochondria are the “cellular power plants” found in all of our cells and they have their own DNA which is separate from that found in the nucleus of the cell.  In humans, and most other species that mitochondria are found in, the father’s mtDNA normally does not contribute to the child’s mtDNA; the child normally inherits its mtDNA exclusively from its mother.  This means that if no one’s genes have mutated, then we all have the same mtDNA as our brothers and sisters and the same mtDNA as the children of our mother’s sisters, etc. This pattern of inheritance makes it possible to rule out “population bottlenecks” in our species’ history.  A bottleneck is basically a time when the population of a species dwindled to low numbers.  For humans, this means that every person born after a bottleneck can only have the mtDNA or a mutation of the mtDNA of the women who survived the bottleneck. This doesn’t mean that mtDNA can tell us when a bottleneck happened, but it can tell us when one didn’t happen because we know that mtDNA has a rate of approximately one mutation every 3,500 years (Gibbons 1998; Soares et al 2009). So if the human race were actually less than 6,000 years old and/or “everything on earth that breathed died” (Genesis 7:22) less than 6,000 years ago, which would be the case if the story of Adam and the story of Noah’s flood were true respectively, then every person should have the exact same mtDNA except for one or two mutations.  This, however, is not the case as human mtDNA is much more diverse (Endicott et al 2009), so we can know for a fact that the story of Adam and Eve and the story of Noah are fictional.   There

ancestor. In fact, this clock tells us that all seven billion people alive today can trace their maternal lineage to one woman who lived in Africa 170,000 years ago, dubbed “Mitochondrial Eve.

Sperm pass on none of their mitochondria during conception, so all mitochondrial information is transferred from generation to generation through mothers alone. Such a system means that there will be many extinctions along the way. A woman endows all her children with her mitochondria, but only her daughters have the mechanism to pass it onward to future generations. So if a woman has only sons or no children at all—and that happens quite often, of course—her personal mitochondrial line will die with her. All her descendants will still have mitochondria, but it will come from other mothers on other genetic lines. In consequence, the human mitochondrial pool shrinks a little with every generation because of these localized extinctions. Over time, the mitochondrial pool for humans has shrunk so much that, almost unbelievably but rather wonderfully, we are all now descended from a single mitochondrial ancestor—a woman who lived in Africa about 200,000 years ago. You might have heard her referred to as Mitochondrial Eve. She is, in a sense, mother of us all.

Consider the genesis of a single-celled embryo produced by the fertilization of an egg by a sperm. The genetic material of this embryo comes from two sources: paternal genes (from sperm) and maternal genes (from eggs). But the cellular material of the embryo comes exclusively from the egg; the sperm is no more than a glorified delivery vehicle for male DNA—a genome equipped with a hyperactive tail. Aside from proteins, ribosomes, nutrients, and membranes, the egg also supplies the embryo with specialized structures called mitochondria. These mitochondria are the energy-producing factories of the cell; they are so anatomically discrete and so specialized in their function that cell biologists call them “organelles”—i.e., mini-organs resident within cells. Mitochondria, recall, carry a small, independent genome that resides within the mitochondrion itself—not in the cell’s nucleus, where the twenty-three pairs of chromosomes (and the 21,000-odd human genes) can be found. The exclusively female origin of all the mitochondria in an embryo has an important consequence. All humans—male or female—must have inherited their mitochondria from their mothers, who inherited their mitochondria from their mothers, and so forth, in an unbroken line of female ancestry stretching indefinitely into the past. (A woman also carries the mitochondrial genomes of all her future descendants in her cells; ironically, if there is such a thing as a “homunculus,” then it is exclusively female in origin—technically, a “femunculus”?) Now imagine an ancient tribe of two hundred women, each of whom bears one child. If the child happens to be a daughter, the woman dutifully passes her mitochondria to the next generation, and, through her daughter’s daughter, to a third generation. But if she has only a son and no daughter, the woman’s mitochondrial lineage wanders into a genetic blind alley and becomes extinct (since sperm do not pass their mitochondria to the embryo, sons cannot pass their mitochondrial genomes to their children). Over the course of the tribe’s evolution, tens of thousands of such mitochondrial lineages will land on lineal dead ends by chance, and be snuffed out. And here is the crux: if the founding population of a species is small enough, and if enough time has passed, the number of surviving maternal lineages will keep shrinking, and shrinking further, until only a few are left. If half of the two hundred women in our tribe have sons, and only sons, then one hundred mitochondrial lineages will dash against the glass pane of male-only heredity and vanish in the next generation. Another half will dead-end into male children in the second generation, and so forth. By the end of several generations, all the descendants of the tribe, male or female, might track their mitochondrial ancestry to just a few women. For modern humans, that number has reached one: each of us can trace our mitochondrial lineage to a single human female who existed in Africa about two hundred thousand years ago. She is the common mother of our species. We do not know what she looked like, although her closest modern-day relatives are women of the San tribe from Botswana or Namibia. I find the idea of such a founding mother endlessly mesmerizing. In human genetics, she is known by a beautiful name—Mitochondrial Eve.

we are all now descended from a single mitochondrial ancestor – a woman who lived in Africa about 200,000 years ago. You may have heard her referred to as Mitochondrial Eve. She is, in a sense, mother of us all.

All modern humans are related to what scientists call "Mitochondrial Eve." This refers to our common matrilineal ancestor. She lived approximately 200,000 years ago and depending on how you estimate the length of a generation, we are only 5,000 to 10,000 generations from one another. To put it another way, each of us is a cousin of one another at most 10,000 times removed. And yes, Mitochondrial Eve lived in Africa, so, in a very real way, we are all Africans.

For modern humans, that number has reached one: each of us can trace our mitochondrial lineage to a single human female who existed in Africa about two hundred thousand years ago. She is the common mother of our species. We do not know what she looked like, although her closest modern-day relatives are women of the San tribe from Botswana or Namibia. I find the idea of such a founding mother endlessly mesmerizing. In human genetics, she is known by a beautiful name—Mitochondrial Eve.

The ancestor of all men, traceable back through a Y-chromosome line, is thought to have lived some time around 140,000 BC probably in west Africa It is a misconception to believe that Mitochondrial Eve and Y-chromosomal Adam were the only men and women living at those times. Theirs are the only lineages that survive in the male and female lines, while others have died out. But it is, sadly, clear that Adam and Eve never knew each other.

In fact, this clock tells us that all seven billion people alive today can trace their maternal lineage to one woman who lived in Africa 170,000 years ago, dubbed “Mitochondrial Eve.