I didn't want to derail political chic's thread on Darwinian evolution so this is a spin-off from that thread. In view of being on the Science section I will start on the/a genetic bottleneck (narrowing of the gene pool) in tracing the common origin (Acts 17:26) of all human races from the mitochondrial Eve and Y-chromosomal Adam. I am not concerned with the molecular clock dating method - that could be still another thread. My primary interest in dates on this thread is whether a date palm was on Noah's ark.
But I also welcome any input on the scientifically tenable belief that all current species of animals came from a relatively few kinds on Noah's ark - and especially zeroing in on how Noah's ark held perhaps 1,000 animals and the food for them without over-crowding. And I will introduce my own theory about organic gardening on Noah's ark later as well. [window boxes] That part can also include some humor btw.
I intend to go into considerable depth in research, as well as imagination. The following source posits 2 genetic bottlenecks:
However, the source is relatively humble despite the extensive research being reported on. In discussing the narrowing of the human gene pool, the source states:
"However, the exact way in which this loss occurred remains somewhat unclear: did it involve one, a few or a continuous series of population bottlenecks? We addressed this by analysing a large published dataset of 783 microsatellite loci genotyped in 53 worldwide populations,"
Of course, the flood would only be one genetic bottleneck - however, the Bible does not record pre-flood history in detail. We do know that the human gene pool on the ark was less than that of animals such that inbreeding is much more dangerous in humans than in cats, for one example. Not to mention the greater variety of cats than that of humans - some even claim there is more than one cat genus and some 40 cat species surviving.
Favoring the out of Africa genetic model, the source notes:
"This decline reflects loss of diversity in population bottleneck(s) as we expanded out of Africa to colonize the world, but the timing, number and location of these events remain obscure."
That is a humble admission - somewhat rare and commendable. But my main point is that the narrowing of the gene pool in at least one genetic bottleneck is proven by genetic research. The authors are correct that genes do not determine geographical location of origins and that dates from molecular clock models are ambiguous.
After great detail in genetic studies involving various factors (such as epigenetic coding including tandem repeats and slippage) the source again humbly admits:
"The above analyses all assume that the different parts of the world that are equidistant from our origin are equivalent and that is clearly not the case. For example, populations in the Middle East are nearer to the origin than some of the within-Africa populations."
It should be noted that the Bible favors an origin in the Middle East.
Well there is much more, but I will stop there and await responses concerning genetic bottleneck(s).
In my next post I will explore models of Noah's Ark: (pun intended)
But I also welcome any input on the scientifically tenable belief that all current species of animals came from a relatively few kinds on Noah's ark - and especially zeroing in on how Noah's ark held perhaps 1,000 animals and the food for them without over-crowding. And I will introduce my own theory about organic gardening on Noah's ark later as well. [window boxes] That part can also include some humor btw.
I intend to go into considerable depth in research, as well as imagination. The following source posits 2 genetic bottlenecks:

Evidence that two main bottleneck events shaped modern human genetic diversity | Proceedings of the Royal Society B: Biological Sciences
There is a strong consensus that modern humans originated in Africa and moved out to colonize the world approximately 50 000 years ago. During the process of expansion, variability was lost, creating a linear gradient of decreasing diversity with ...
royalsocietypublishing.org
However, the source is relatively humble despite the extensive research being reported on. In discussing the narrowing of the human gene pool, the source states:
"However, the exact way in which this loss occurred remains somewhat unclear: did it involve one, a few or a continuous series of population bottlenecks? We addressed this by analysing a large published dataset of 783 microsatellite loci genotyped in 53 worldwide populations,"
Of course, the flood would only be one genetic bottleneck - however, the Bible does not record pre-flood history in detail. We do know that the human gene pool on the ark was less than that of animals such that inbreeding is much more dangerous in humans than in cats, for one example. Not to mention the greater variety of cats than that of humans - some even claim there is more than one cat genus and some 40 cat species surviving.
Favoring the out of Africa genetic model, the source notes:
"This decline reflects loss of diversity in population bottleneck(s) as we expanded out of Africa to colonize the world, but the timing, number and location of these events remain obscure."
That is a humble admission - somewhat rare and commendable. But my main point is that the narrowing of the gene pool in at least one genetic bottleneck is proven by genetic research. The authors are correct that genes do not determine geographical location of origins and that dates from molecular clock models are ambiguous.
After great detail in genetic studies involving various factors (such as epigenetic coding including tandem repeats and slippage) the source again humbly admits:
"The above analyses all assume that the different parts of the world that are equidistant from our origin are equivalent and that is clearly not the case. For example, populations in the Middle East are nearer to the origin than some of the within-Africa populations."
It should be noted that the Bible favors an origin in the Middle East.
Well there is much more, but I will stop there and await responses concerning genetic bottleneck(s).
In my next post I will explore models of Noah's Ark: (pun intended)