The Genetics of Adam and Eve, The Difficulty with Genesis 1:27-28

by Sean McDowell

Passage: God created human beings in his own image. In the image of God he created them; male and female he created them. Then God blessed them and said, “Be fruitful and multiply. Fill the earth and govern it” (Genesis 1:27-28).

Difficulty: Doesn’t the science of genetics refute the concept that the entire population of the world came from just one couple?

Explanation: Over the past couple of decades researchers have used “population genetics” to estimate initial population size of the human species. By studying human genetic diversity in the present day, they have tried to extrapolate back to determine the minimum size of the original population of humans necessary to produce the diversity we observe today. Some have argued that it is impossible for civilization to have come from one human couple.

Dr. Francis S. Collins is a physician and geneticist who in 2007 formed the San Diego–based BioLogos Foundation. It is an organization that promotes theistic evolution among evangelicals. Dennis R. Venema, PhD, a BioLogos senior fellow for science and biology chairman at Trinity Western University, is a writer for BioLogos. He too is a theistic evolutionist who is trying to promote harmony of Darwinian science and faith within the evangelical community.

Dr. Venema claims that human population “was definitely never as small as two.” He contends that “our species diverged as a population. The data are absolutely clear on that.” 1 He asserts that to reach the level of genetic diversity we see today, the initial population of humans would have had to be several thousand individuals at minimum—not one couple.

Not all biologists, however, agree with Dr. Venema. Dr. Ann Gauger is senior research scientist at the Biologic Institute, a pro–intelligent design research lab based near Seattle, Washington. She earned a PhD in biology from the University of Washington, and later did postdoctoral work at Harvard. In the chapter “The Science of Adam and Eve” in the 2012 book Science and Human Origins, Gauger finds that Venema’s arguments were based upon a now outdated study of genes involved in the human immune system…

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