People have continued to evolve since leaving the ancestral homeland in northeastern Africa some 50,000 years ago, both through the random process known as genetic drift and through natural selection. The genome bears many fingerprints in places where natural selection has recently remolded the human clay, researchers have found, as people in the various continents adapted to new diseases, climates, diets and, perhaps, behavioral demands.
A striking feature of many of these changes is that they are local. The genes under selective pressure found in one continent-based population or race are mostly different from those that occur in the others. These genes so far make up a small fraction of all human genes.
“Twin studies are great for examining nature versus nurture questions,” explains Nancy Segal, professor of psychology at California State University at Fullerton and author of “Indivisible by Two: Lives of Extraordinary Twins.” “Comparing identical twins with fraternal twins, in regards to how frequently a trait is shared, tells us the degree to which that trait is influenced by genetics or by the environment.”
...twins raised apart share only their genes, while the twins raised together share both genes and environment. It would seem obvious that the twins raised together would be more alike than twins raised separately — but it simply isn’t true. A twin in either group, raised apart or together, was about 50 percent similar to his co-twin in personality traits, interests and attitudes, suggesting that environment has little influence on personality.
...evidence has been mounting that shows that parents have far less of a role in molding their child than previously thought. Your child’s genes are, in fact, the overwhelming factor in the type of person your child becomes.
Whether you prefer Rush Limbaugh or Keith Olbermann has to do with your genes and your psychology, according to a new study.
“Forty, perhaps 50 percent of our political beliefs seem to have a basis in genetics,” said Hibbing, whose studies were included in Jost’s analysis. While genetics are unlikely to “hardwire” people into being liberal or conservative, Hibbing said that genes could make people more or less likely to have certain values or react to situations in a particular way.
Humans have moved into the evolutionary fast lane and are becoming increasingly different, a genetic study suggests.
In the past 5,000 years, genetic change has occurred at a rate roughly 100 times higher than any other period, say scientists in the US.
"Genes are evolving fast in Europe, Asia and Africa, but almost all of these are unique to their continent of origin," he added. "We are getting less alike, not merging into a single, mixed humanity."
This is happening, he said, because "there has not been much flow" between different regions since modern humans left Africa to colonise the rest of the world. And there is no evidence that it is slowing down, he added.-bbc.com
At the same time evidence is slipping out of the laboratory and into everyday life, carrying with it the inescapable message that people of different races have different DNA.
Such developments are providing some of the first tangible benefits of the genetic revolution. Yet some social critics fear they may also be giving long-discredited racial prejudices a new potency.
On July 16, 2002, a survey crew from the Department of Transportation found Pam Kinamore's nude, decomposing body in the area along the banks of the Mississippi known as Whiskey Bay, just west of Baton Rouge. The police tested the DNA and quickly realized that they were dealing with a serial killer...
In late December, after a fourth murder, police set up a dragnet to obtain DNA from some 1200 white men. Authorities spent months and more than a million dollars running those samples against the killer's. Still nothing.
In early March, 2003, investigators turned to Tony Frudakis, a molecular biologist who said he could determine the killer's race by analyzing his DNA. They were unsure about the science, so, before giving him the go-ahead, the task force sent Frudakis DNA swabs taken from 20 people whose race they knew and asked him to determine their races through blind testing. He nailed every single one."Your guy has substantial African ancestry," said Frudakis. "He could be Afro-Caribbean or African American but there is no chance that this is a Caucasian. No chance at all."
There was a prolonged, stunned silence, followed by a flurry of questions looking for doubt but Frudakis had none. Would he bet his life on this, they wanted to know? Absolutely. In fact, he was certain that the Baton Rouge serial killer was 85 percent Sub-Saharan African and 15 percent native American.
The police had also refused to listen to the pleadings of Collette Dwyer, who thought she might know the serial killer's identity: Derrick Todd Lee, a 34 year-old black man with an extensive rap sheet for domestic violence, assault, stalking and peeping. Lee had stalked Dwyer for two years after meeting her at the seafood shop where she worked. One day, he pushed his way into her apartment, got a drink of water and told her he wanted to "take care" of her.
Lee was arrested after her two children chased him and noticed he had a gun. He was sent to prison for two years. Dwyer called police after Pace's murder in May, Kinamore's in July and again in September following the release of the FBI profile. The police talked to Lee but didn't bother to take DNA since they were looking for a white man.
But after the conference call with Frudakis, Lee jumped to the top of the suspect list. They got a subpoena for his DNA, collected a cheek swab and a day later, they had their answer: he was their man. Lee skipped town just ahead of the arrest warrant but was tracked down in Atlanta and returned to Baton Rouge within days. "CAUGHT" declared the Baton Rouge Advocate in giant print.
A victim might not care if a murderer is a smoker or a vegetarian. But having such knowledge could help police solve a case. Details like this could one day be at their fingertips if a new fingerprinting technique pans out as expected.
Standard methods for collecting fingerprints at crime scenes, which involve powders, liquids or vapors, can alter the prints and erase valuable forensic clues, including traces of chemicals that might be in the prints.
Now researchers find tape made from gelatin could enable forensics teams to chemically analyze prints gathered at crime scenes, yielding more specific information about miscreants' diets and even possibly their gender and race.
The above is but a small percentage of the articles in which the reality of race, and the importance genetics plays in who we are, comes shining through. Oh you may have to sift through the PC apologetics, but the information, the truth, is there....