Bucky_McLachlan wrote...
Ecael wrote...
Humans aren't even remotely the most genetically diverse creatures on Earth.
I love how people who have no idea what they're talking about just say this as if it's just a well documented fact.
Looks like you just read the first and last lines of my post again, Bucky.
Humans haven't been around long enough to have actual genetic variation. You're confusing genotype with phenotype (which I spent the rest of my post explaining, but you apparently didn't even bother to read). Also, look up Mitochondrial Eve and Y-chromosomal Adam for further evidence that humans didn't start becoming even remotely varied until *after* their near-extinction event, a major population bottleneck brought on by a rapid change in climate or a massive natural disaster.
http://www.bbc.co.uk...es_script.shtml"This confirmed what other geneticists have noticed. Given the length of time humans have existed, there should be a wide range of genetic variation, yet DNA from people throughout the world is surprisingly similar. What could have caused this? The answer is a dramatic reduction of the population some time in the past: a bottleneck."
http://science.educa..._variation1.htm"
****** sapiens is a relatively young species and has not had as much time to accumulate genetic variation as have the vast majority of species on earth, most of which predate humans by enormous expanses of time. Nonetheless, there is considerable genetic variation in our species. The human genome comprises about 3 x 10^9 base pairs of DNA, and the extent of human genetic variation is such that no two humans, save identical twins, ever have been or will be genetically identical. Between any two humans, the amount of genetic variation—biochemical individuality—is about
0.1 percent. This means that about one base pair out of every 1,000 will be different between any two individuals."
Name me a single species on this planet that it as wide spread and varied as human beings,
If you can name me one such creature I will give you a gold star.
Even though humans are obviously larger in mass (and superior in intelligence) in comparison to other species on Earth, their c-value/genome size (which includes both coding and non-coding DNA) is relatively small. This is known as the C-value enigma, which can only be explained so far by the fact that much of the DNA of an organism is non-coding. However, in order to truly find out what DNA codes for what and what doesn't code at all, you'd have to sequence an organism's genome and manually vary the gene through selective breeding or experimental gene insertion and deletion. Most of these studies are done on animals or plants that are agriculturally useful (like wheat), so it's currently unfeasible to start comparing non-coding DNA.
http://aob.oxfordjou...t/full/95/1/133"It is a mere truism that for every genome there is a size, defined by either mass (in picograms, pg) or number of base pairs (bp). It is far from a given, however, that these sizes should be (mostly) constant species-specific characters, that they should vary over several orders of magnitude among eukaryotes, or that they should bear no connection to organismal complexity."
and still has the ability to copulate with other related organisms
without resulting in the birth of an organism that is inferior in many
ways, often deformed and incapable of breeding.
Not many humans even get far enough to be born:
http://www.mayoclini...arriage/DS01105"About 10 to 20 percent of known pregnancies end in miscarriage. But the actual number is probably
much higher because many miscarriages occur so early in pregnancy that a woman doesn't even know she's pregnant. Most miscarriages occur because the fetus isn't developing normally."
You owe me a lot of gold stars.
Also, it seems like you're better at dismissing arguments rather than refuting them. And even when you do, you try to make use of what you believe is correct through your "common sense" instead of looking at and understanding the facts.
(Oh, and in terms of Mass Effect -- if the Reapers really wanted species purely for their genetic material, they would start kidnapping protozoa.)
:innocent:
Modifié par Ecael, 18 avril 2010 - 11:35 .
. I do remember one ele event that happen 65 million years ago. Are you talking about the ICE age?
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