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11 votes

Genes and Intelligence

A few words on genomic prediction No complex trait is 100% heritable, hence no prediction based entirely on DNA would ever be perfect. With that said, predictive genomics is progressing at a quite ...
Eff's user avatar
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10 votes

Is hunting animals, crafting and attacking/defending from enemies intellectually equivalent to learning quantum physics?

Addressing some assumptions/presumptions apparently present in the question (this might be too long for a comment): First, natural selection has not stopped. The sexual selection might be more active ...
Eugene Ryabtsev's user avatar
9 votes

What are the consequences of inbreeding?

You are right. Inbreeding strongly increases overall homozygosity which subjects inbred individuals to diseases caused by rare recessive alleles. In non-inbred individuals the chance is quite low to ...
AlexDeLarge's user avatar
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6 votes

Have there been any successful studies showing that it is possible to increase IQ?

When talking about increasing intelligence there are a few things you have to keep in mind. Can you increase your IQ score? Probably, yes. Just take the same test twice, or more realistically practice ...
Eff's user avatar
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6 votes

Is hunting animals, crafting and attacking/defending from enemies intellectually equivalent to learning quantum physics?

You seem to think that living in the natural environment is "easy". But, even when the climate helps, even when you have no war to fight or defend against, even so you have to know the habits of the ...
Rodrigo's user avatar
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5 votes
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How do heredity and regression to the mean work with respect to intelligence?

I think the question mainly highlight either of two misunderstandings: misunderstanding about the definition of heritability misunderstanding why the slope of the regression line is equal to ...
Remi.b's user avatar
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5 votes
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What are the consequences of inbreeding?

There is indeed evidence that inbreeding in humans lowers intelligence of offspring. In summary, our comprehensive assessment revealed that parental consanguinity and degree of inbreeding was ...
CuriousIndeed's user avatar
5 votes
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Which animals do bait hunting?

Well, Crocodylus palustris do this using sticks that birds want for nesting. (Photo from below article, copyright) Behind a paywall is: Crocodilians use tools for hunting. V. Dinets, J.C. Brueggen &...
Polypipe Wrangler's user avatar
4 votes
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Intelligence without natural selection?

The answer is yes, but really no. It’s probably true that things were kind of laid back at first for life. But selection was still going on. A strong wave might break the membrane, a strong wind or ...
shigeta's user avatar
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4 votes
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Is there any running experiment to selectively breed non-human smart animals?

The question is rather hard to answer as the measure of intelligence can be defined within many different aspects. I am not aware of specific 'breeding' approaches in this context. Moreover, it also ...
Philippe VdS's user avatar
3 votes
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Do the mother's genes determine the sons' (heredity) intelligence more than the father's?

You might want to take a look on the wikipedia site for x-linked recessive inheritance. The article by Turner mentions that out of 325 known recessively inherited genes associated with mental ...
Agerhell's user avatar
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3 votes

Why do women have less synapses / neurons / brain mass than men despite having the same average IQ?

In brief, so far as we can tell size matters far less than brain architecture. Consider that humans have only about half as many cortical neurons as a number of whales, yet are clearly far more ...
jakebeal's user avatar
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3 votes

Genes and Intelligence

IQ typically has a relatively high heritability (see this post). Please have a look at this post to understand the concept of heritability. In order to know what loci (QTL as the trait of interest is ...
Remi.b's user avatar
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3 votes

Are Richard Lynn's estimates of African IQ inherently innacurate on the basis that most Africans aren't mentally retarded?

IQ is just a measure of how good you are at taking IQ tests, that's it. Those tests are usually culturally biased towards middle income first world citizens (among other things). Think of it this way, ...
John's user avatar
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3 votes

Is it true that the human brain has not evolved in 100 000 years?

tl;dr Here are the two claims you make human brain has not evolved in 100 000 years Wrong! there are no genes for intelligence. Wrong! The claim ...
Remi.b's user avatar
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3 votes

What are the consequences of inbreeding?

Inbreeding, in nature at large, has one primary effect, as you said. It increases the chances of two copies of harmful, recessive alleles. Consequently, offspring are much more likely to suffer from ...
ScottishTapWater's user avatar
3 votes

Is hunting animals, crafting and attacking/defending from enemies intellectually equivalent to learning quantum physics?

I don't think this is really a biology question; philosophy, maybe. Or for the history and philosophy of science. The main problem is: what does "INTELLECTUALLY equivalent to" actually mean? What ...
pjc50's user avatar
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2 votes

Have creatures ever evolved to become less intelligent?

Domestication is often given as an example, though it seems to be debated. I'm guessing almost all parasites have become less intelligent in their evolution to parasitism, you could probably find ...
Oosaka's user avatar
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2 votes

Have creatures ever evolved to become less intelligent?

Unfortunately, measuring intelligence (assuming we would have a strict definition) is not a thing that can be done from fossil record or genetic data. The only thing one can do is to compare brain ...
Remi.b's user avatar
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2 votes
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Current Trend in Evolution of Human Intelligence

There appears to be some - note that this, of course, is highly controversial - evidence pointing at the direction that intelligence declined in the US and UK during the last century. There is a ...
AlexDeLarge's user avatar
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2 votes

Is it true that the human brain has not evolved in 100 000 years?

Every part of the human genome is constantly evolving - but at a VERY slow rate. Therefore there are only a few changes from the last 100k years (This article describes this quite well). Intelligence ...
Nicolai's user avatar
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2 votes

Book on current state of knowledge on the genetics of intelligence

A very recent review has been written on this. See Plomin, von Stumm (2018): The new genetics of intelligence. For some of the latest genome-wide association studies, see: Hill, et al (2017): A ...
Eff's user avatar
  • 680
2 votes

Its there a gene or genes for intelligence?

Is IQ heritable? Let me start by saying that there is no commonly agreed upon method to measure IQ (thank you @mdperry). Keeping this in mind... Yes, studies have shown that IQ is heritable. Or ...
Remi.b's user avatar
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2 votes

Genes and Intelligence

No, because the trait you describe does not exist Your question betrays a common misunderstanding of how genetics and the environment interact in order to produce complex phenotypes. In fact, every ...
Jack Aidley's user avatar
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2 votes

Correlation brain size and muscle volume

I like the muscle_fiber/more_neuronal_mass theory. It makes a lot of sense having a better networked neural structure if you have more efferent processes to look at (in the form of more muscle fiber ...
pawelek zzz's user avatar
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2 votes

Why don't intelligent animals like primates use plastic bags?

Bags are not that useful if your are not human. Most primates are too small to get any benefit from it, the bags are too large and would drag on the ground or get snagged on branches, even chimps and ...
John's user avatar
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2 votes
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Is there a difference between human neuron cells compared to those of other animals?

Not really. There really is little difference in neurons in mammal and indeed not much change across vertebrates. You have to go back all the way to jellyfish before you find major differences in ...
John's user avatar
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2 votes

Is there any running experiment to selectively breed non-human smart animals?

I think you will have to take an answer here that is not the answer you wanted. I truly believe that there is no secret base making an army of intelligent dingo soldiers. We are currently at the ...
shigeta's user avatar
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1 vote

Is there a difference between human neuron cells compared to those of other animals?

As you mentioned yourself, there are differences in brain size, form and structure. This difference also affects the size and shape of cells, i.e. you won't find meter-long neurons in mice, but rather ...
KaPy3141's user avatar
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1 vote

What factors have led to selection for intelligence in crows and rooks?

This article posits that a lot of the reasons for primates to have evolved to be more intelligent (i.e. a costly and unpredictable environment, which requires complex thinking and problem-solving ...
MZiegenhorn's user avatar

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