Heritability | Behavior | MCAT | Khan Academy

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Created by Ryan Scott Patton.
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Опубликовано:

9 дек 2013

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Комментарии : 47

@-homechord-2908 4 года назад

I think maybe if I rewatch this is the morning I might understand 20% of the concept

@isoantti 5 лет назад

Now let me show you my favorite example of *four twelve-year old boys locked in barrels* :)

@andressab.479 9 лет назад

This helped me a lot. Thank you so much!

@emmalouise1178 6 лет назад

I was very confused about heritability and this was very helpful to understand my course deeper!! thankyou :)

@worldglobe9000 10 лет назад

Very nice explanation! Worked for me where the textbooks failed.

@yusufshakirah5421 9 лет назад

Wow! this is great. Av a better understanding of my course work

@BadSho7 9 лет назад

thank you! :)

@AJ-iy4mf 8 лет назад

Thank you so much!

@johntough7936 5 лет назад

Very clear! thankyou

@nirija4158 3 года назад

Great sir... Thanks a lot to explain this concept with so much ease

@kayleealger1117 2 года назад

Thanks for the helpful video, this really clarified things! I do have one question, though. You mentioned that as environment becomes more controlled, heritability increases, and as genetic variation increases, heritability increases, which makes sense. However, I wonder, which one takes precedence, genetic or environment variation? For example, take a pair of identical twins - same genetics, probably raised in a pretty similar (if not the same) environment. Then take a pair of distant cousins. Both vary a lot genetically, and both are probably raised in pretty different environments. Would the heritability for the twins or the cousins be higher? Does the controlled, similar environment of the twins make their heritability higher than the genetic differences of the cousins makes theirs?

@chocoberry434 9 месяцев назад

Oh my thank you so much for the explanation! this really really helps me a lot!

@KaiserinAstrid 10 лет назад

The differences in intelligence would also widen due to the extra environmental variation. To simplify things, if you take three groups, two raised in the same country and one raised on the moon and one of the groups in the country is identical to the one in outer space, the cognitive gap between the two groups in the same country will be more heritable, but that's also because the gap would be smaller. The environment diminishes heritability by increasing total variation.

@bokonoo77 Год назад

Learn about genetic expression and non coding genes

@pramodhsrihari493 Год назад

Excellent video, helps me with my MCAT.

@Goldenliz01 3 года назад

very helpful!

@Princess-ec4cl 3 года назад

You explain so so well wow!

@renaisantyaa 2 года назад

thank you sooooooo much

@mr.hongang6064 4 года назад

I gotta perform this experiment 😂

@ahlammallak8853 2 года назад

great explanation! thank you so much :)

@tasbeehullah3567 Год назад

Your picture is so beautiful

@divyanshupathak2069 4 года назад

This helped a lot. Explaination was on point. Thank you so much. You people are doing a tremendous job, hope I could do the same in future.

@lolzerd3745 5 лет назад

I doubt I'll get an answer here from someone because the video is really old but I'll try anyway. I often hear this 80% heritability figure thrown around but if I understand the term correctly then this figure only makes sense in the context of a given population. If so, what population is this 80% figure referring to? The entire world? America? Europe?

@paulcraig6976 5 лет назад

It means 80% of the variance in between individuals is 80% heritable.

@nollhypotes 4 года назад

@@paulcraig6976 No, because heritability is group-specific. You have to look at the study to get a sense of where it's applicable. I suppose if the heritability estimate comes from a study conducted on a certain community, say middle-class people in Sweden, and the sample size was large enough, you would be able to generalize that heritability estimate to explain IQ differences between people in that particular group. If the group is poorly defined, it's going to be increasingly less accurate though, and it can't say anything about heritability for another group or between groups.

@womanxyz14 4 года назад

So what would happen if the 4 quadruplets were raised in identical 4 barrels?

@desto2586 4 года назад

I don’t think the kids would know they’re in different barrels so the results might still be the same even if the barrels are the same

@rrussell21 4 года назад

Maybe h=0.5 ?

@womanxyz14 4 года назад

@@rrussell21 was that just random or are you trying to say something? because I did not get it

@georgesgreig 3 года назад

You can’t measure heritability in that case because theoretically there would be no difference between their IQs

@nathanmageau8287 6 лет назад

anybody else think this dude sounds just like mike birbiglia?

@matthewjames7513 3 года назад

Is this right? the heritability in identical twins must always be 0 (since they have identical genes) and so there is no genetic variation between them. This is confusing, because the word heritability at an intuitive level implies to me that if the heritability is high, then you would be more similar. Hmm

@SushiDud 3 года назад

If I understood it correctly, heritability means the extent of the effect of genes on the fenotype relative to the environment. A high level of heritability means the genes have more impact on the fenotype than the environment does. And a low level of heritability means the environment has more impact than the genes.

@johannesbentzon 2 года назад

@@SushiDud correct

@johannesbentzon 2 года назад

@@SushiDud that’s why it only applies to populations because it would not make sense to compare someone from ex. Iceland and Morocco - the environmental differences would be so large that the variance among the individuals would almost certainly be attributed to the environmental differences. Simply, we would not be able tell genes and environment apart. This also confirms that heritability measures are never 100% accurate - even if it’s a population. The basic assumption is that populations share “same environment”, which we all know is not true. However, it is the best measurement we’ve got, I guess

@badinfluence2617 5 лет назад

idk why pseudoscience is pushed intelligence is a heritable trait i don know why people lie to themselves different races do have different rates of intelligence we are not all the same

@frank6033 9 месяцев назад

Cope😢

@raygrogan5932 5 лет назад

Questioning the genetic component of IQ is "completely inappropriate"? Really? so much for science, then? I'm 1:43 into this video and I'm not watching the rest. You should be ashamed, Ryan.