john hawks weblog

paleoanthropology, genetics and evolution

Bad genes

Sun, 2009-11-01 07:30 -- John Hawks

Well, if your genes don't make you a bad driver, maybe they'll make you a murderer: "Lighter sentence for murderer with 'bad genes'"

On the basis of the genetic tests, Judge Reinotti docked a further year off the defendant's sentence, arguing that the defendant's genes "would make him particularly aggressive in stressful situations". Giving his verdict, Reinotti said he had found the MAOA evidence particularly compelling.

Hello? If the court is going to accept evidence about genotypes, wouldn't the logical thing be to lock up people with the bad genes? Or, to put it another way, isn't this judgment discriminatory against defendants with the "non-aggressive" genotypes?

Steve Jones is quoted in the article making a similar point:

"90% of all murders are committed by people with a Y chromosome males. Should we always give males a shorter sentence?" says Steve Jones, a geneticist at University College London. "I have low MAOA activity but I don't go around attacking people."

Good for him! The story goes on to note that this defense is increasingly common in the U.S., where it has influenced some sentencing decisions. It also includes some argument about race as a confounding factor -- association studies linking MAOA with violent crime come to different results depending on the ancestry group of the subjects.

Neandertals

For years, I've worked on their bones. Now I'm working on their genes. Read more about the science studying these ancient people.

Denisova

From a finger bone of an ancient human came the record of a completely unexpected population. My lab is working on the science of the Denisova genome.

Acceleration

The advent of agriculture caused natural selection to speed up greatly in humans. We're uncovering some of the ways that populations have rapidly changed during the last 10,000 years.

Malapa

Just outside Johannesburg, the Malapa site is producing some of the most exciting finds in human evolution. This site is the headquarters of the Malapa Soft Tissue Project.