G
grannymh
Guest
It is my intention to respect the ban on evolution discussion. If anyone wishes to discuss this particular e-mail, they may do so on my thread in Back Fence Forum provided the guidelines in sticky notes are followed.
forums.catholic-questions.org/showthread.php?t=478146
The following e-mail is only presented as a sample of some of the thinking within the Intelligent Design community:
forums.catholic-questions.org/showthread.php?t=478146
The following e-mail is only presented as a sample of some of the thinking within the Intelligent Design community:
Thanks very much for your note. You asked me to answer two questions, and I will do my best:
I’m not a human geneticist, but it seems very unlikely to me. I don’t see how the existing degree of genetic diversity in our species could be accounted for by just two individuals.
- Are there two sole parents of the human species?
I don’t think so, for the reason stated above. However, it depends what you mean by “descend.” For example, if you mean to ask whether all human beings alive today might be able to find two specific individuals in their ancestry, I certainly do believe that’s possible, even though it would not mean that our species started out with just those two. To explain when I mean, consider a hypothetical situation where 30 families, each with a different surname (Johnson, Miller, Smith, Jones, etc…) are living on an isolated island. As their children grow, they marry individuals from other families, and change their family names as we do, which means that each woman, as she marries, takes the family name of her husband. As you can well imagine, there might be a generation in which 3 or 4 of the families would only produce girls among their children. As a result, those family names would be eliminated from the island.
- Did the entire human species descend from two people?
It might take a while, but eventually, the island might have just two or three family names. After a very long while, just one name might survive (let’s assume it would be “smith”).
Now, the inhabitants of the island would indeed be justified in thinking they had all descended from just two people - Mr. and Mrs. Smith, way back when there were 30 surnames on the island. However, that would really be just a consequence of how we determine the family names of married couples. In fact, their genetic makeup would be just as much descended from the Johnsons and the Jonses as from the Smiths.
So, yes, in this sense, given 6 million years, I don’t find it at all improbably that each living human being today can trace ancestry back to just two individuals.
I hope I’ve answered your questions.