
Originally Posted by
JEVIII
Furthermore...
A mutation is any change in the sequence of DNA. All known mutations cause a loss of information. The rate at which all types of mutations occur per generation has been suggested to be greater than 1,000. We inherit mutations from our parents and also develop mutations of our own; subsequently, we pass a proportion of those on to our children. So it is conceivable in the many generations between Adam and Moses that a large number of mutations would have been present in any given individual.
Genetic bottlenecks (or population bottlenecks) occur when significant proportions of the population dies or proportions become isolated. Such a bottleneck occurred at the time of Noah’s flood when the human population was reduced to eight people (Genesis 6–9). Other smaller bottlenecks occurred following the Tower of Babel dispersion (Genesis 11). These events would have resulted in a major reduction of genetic variety.
For every gene there are two or more versions called alleles. This is analogous to the color red (gene) but different shades of red—light and dark (alleles). It is possible for “good” (unmutated) alleles to mask or hide “bad” (mutated) alleles. However, in a smaller population with less allelic variation, this becomes more difficult to accomplish, and thus mutated alleles have a greater effect.
Although Noah lived 950 years, his father, Lamech, lived only 777 years (granted we do not know if he died from old age). In addition, we do not know how long Noah’s wife lived, but Noah’s son Shem only lived 600 years. Considering that the longest recorded life span of someone born after the Flood was Eber at 464 years, it would appear that both mutations and genetic bottlenecks had severe effects on aging and life span.