The Y chromosomes in all humans worldwide are very similar, indicating a recent sole male ancestor – matching Noah, and before him, Biblical Adam.
There are three mtDNA lineages, perfectly matching the Bible's record of the three wives on the Ark who repopulated the Earth.
These three mtDNA lineages are very similar, indicating they diverged from a single female ancestor who lived one to two thousand years before the Flood – matching Biblical Eve. Eve's mtDNA would have diverged down through Eve's descendents for roughly 1,500 years (~75 generations), then at the Flood only three lineages were taken onto the Ark.
The life spans of Noah's descendants decrease exponentially – on a graph, it's a biological decay curve. This is expected if creation is true.
Humans have a high mutation rate, passing down over 100 mutations per generation. This is consistent with a human history of thousands, not millions, of years.
If we descended from apes millions of years ago, our DNA would have diverged considerably (1 million years = ~50,000 generations). Since all humans today have virtually identical DNA, evolutionists had to come up with an explanation for this, so a population bottleneck was proposed (actually two, for males and females) where only ONE female's lineage AND ONE male's lineage survived to today, while thousands of other males and females, living at the same time, lineages died out. One lineage dying out is very improbable; BOTH dying out - in an expanding, post-bottleneck population no less - is ridiculously improbable.
http://www.astirinch.com/creation/dna-proof-of-noahs-flood/
What you're forgetting here is that evolution works on two basic principles: 1) descent with modifications (mutations) and 2) natural selection ("survival of the fittest").
Prior to the great population explosions which began with agriculture 10,000 years ago, natural selection weeded out all but the most perfect specimens of their species.
So, with small populations and very aggressive natural selections, relatively few genetic mutations survived from ancient times.
But with agriculture, cities, culture, learning, medicines, etc., more people lived much longer and were able to pass their mutations down to following generations.
So the normal "scrubbing action" of natural selection was greatly reduced, and many more mutations survive from recent generations.
Mechanicos: "There are three mtDNA lineages, perfectly matching the Bible's record of the three wives on the Ark who repopulated the Earth."
No, there are many more than three:
Mechanicos: "These three mtDNA lineages are very similar, indicating they diverged from a single female ancestor who lived one to two thousand years before the Flood – matching Biblical Eve.
Eve's mtDNA would have diverged down through Eve's descendents for roughly 1,500 years (~75 generations), then at the Flood only three lineages were taken onto the Ark."
In scientific terms, that's pure fantasy, corresponding to no known facts or theories.
Mechanicos: "Humans have a high mutation rate, passing down over 100 mutations per generation.
This is consistent with a human history of thousands, not millions, of years."
Different studies produced different results, and all acknowledge that most mutations are apparently harmless.
But even if, for sake of argument, we accept your figure of 100 mutations per generation, remember that is 100 base pairs out of over three billion!
And this rate of mutation multiplied over the seven million years said to separate humans from chimpanzee ancestors, produces roughly the number of base-pair differences reported between them: 4% = 120 million or so.
But I don't accept your 100 base-pair mutations per generation, because that number varies greatly with conditions.
Also varying: reported differences between chimp & human DNA, depending on exactly what is, and how it's, measured.
My only point here is that there's nothing "illogical" about average rates of mutation and the numbers of base-pair differences measured between humans & chimps.
Which is not to claim it's all perfectly understood, far from it -- only that nothing about it seems "impossible".