Which pair of chromosome in body determine intelligence?
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Where, oh where, does intelligence come from?
Genes seem a sure bet--or at least a significant player in a pool of important factors. After all, scientific studies have long suggested that intelligence, as measured by intelligence quotient (IQ) tests, is heritable. If one of your parents has a high IQ, you are more likely to have a high IQ. If you are a member of a pair of identical twins, you are more likely to have matching IQ scores than your fraternal counterparts. Your IQ is also more likely to be on par with your siblings than your cousins. IQ, like height or eye color, seems to pass through the ancestral bloodlines. Thus, there must be a few genes helping propagate those smarts.
Over the past decade, there have been several studies suggesting potential gene variants that may be linked to IQ. Specific gene variants of APOE, a gene associated with Alzheimer's disease, seemed likely candidates. Single nucleotide polymorphisms (SNPs) from the brain-derived neurotrophic factor (BDNF), a cholinergic receptor (CHRM2) and cathepsin D (CTSD), a gene linked to schizophrenia, also showed some promise. All in all, about an even dozen different SNPs have popped up over the years as being significantly correlated with IQ scores. But a new study, led by Chris Chabris and David Laibson, suggests that none of these are linked to intelligence when you have a statistically powerful sample size. The group used three independent data sets with thousands of participants--and none of the findings were replicated.
So why look for intelligence genes at all? Chabris, a psychological scientist at Union College, believes that they can help identify interesting molecular pathways and neural circuits in the brain.
"I don't view finding genes as an end in itself. It's not that interesting to have a list of random letter and number acronyms listed next to some trait. That doesn't add much to our knowledge," he says. "But once we know something about the gene, then we can connect intelligence at the psychological level to biology in a new and potentially more interesting way."
________________________________________________________________________
☺☺ Hope it hlps. ☺☺
◆◆ Have a good day dear ◆◆
◆◆ Ur ans is here ◆◆
________________________________________________________________________
Where, oh where, does intelligence come from?
Genes seem a sure bet--or at least a significant player in a pool of important factors. After all, scientific studies have long suggested that intelligence, as measured by intelligence quotient (IQ) tests, is heritable. If one of your parents has a high IQ, you are more likely to have a high IQ. If you are a member of a pair of identical twins, you are more likely to have matching IQ scores than your fraternal counterparts. Your IQ is also more likely to be on par with your siblings than your cousins. IQ, like height or eye color, seems to pass through the ancestral bloodlines. Thus, there must be a few genes helping propagate those smarts.
Over the past decade, there have been several studies suggesting potential gene variants that may be linked to IQ. Specific gene variants of APOE, a gene associated with Alzheimer's disease, seemed likely candidates. Single nucleotide polymorphisms (SNPs) from the brain-derived neurotrophic factor (BDNF), a cholinergic receptor (CHRM2) and cathepsin D (CTSD), a gene linked to schizophrenia, also showed some promise. All in all, about an even dozen different SNPs have popped up over the years as being significantly correlated with IQ scores. But a new study, led by Chris Chabris and David Laibson, suggests that none of these are linked to intelligence when you have a statistically powerful sample size. The group used three independent data sets with thousands of participants--and none of the findings were replicated.
So why look for intelligence genes at all? Chabris, a psychological scientist at Union College, believes that they can help identify interesting molecular pathways and neural circuits in the brain.
"I don't view finding genes as an end in itself. It's not that interesting to have a list of random letter and number acronyms listed next to some trait. That doesn't add much to our knowledge," he says. "But once we know something about the gene, then we can connect intelligence at the psychological level to biology in a new and potentially more interesting way."
________________________________________________________________________
☺☺ Hope it hlps. ☺☺
◆◆ Have a good day dear ◆◆
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