'Why Women Are Stripey' - Veritasium

[themooselord]

[media]http://www.youtube.com/watch?v=BD6h-wDj7bw[/media]

[nnanna]

i got an answer to a question i didn't even know that exists

[Gump]

Those sounds are unsettling

[Rhenae]

Hmm I was always told it was more if a mosaic pattern, in random little patches rather than stripes?
I suppose ive mostly heard that in relation to the eyes though rather than skin (this is why women are less often colour blind, one x can carry colour blind ness but the other cells can accomodate)

[elix]

Did you know that all humans are striped? We just can't see them under ordinary conditions. They're called [URL="https://en.wikipedia.org/wiki/Blaschko's_lines"]Blaschko's Lines[/URL], and they were discovered in 1901.

[video=youtube;5ACv2eCmeuo]http://www.youtube.com/watch?v=5ACv2eCmeuo[/video]

Since embedding doesn't include embedding direct to a timecode, go to 39:37 or [URL="https://www.youtube.com/watch?v=5ACv2eCmeuo#t=2373"]just click here[/URL]. We're also very very faintly bioluminescent.

[PN_Redux]

that is quite fascinating. I had no idea it could effect someone like this or even a cat

[Sableye]

well now someone's gotta make people grow fur just so we can see this

[MuThing]

I hate how it takes only about a third of the entire video to explain the lines and why.

[Impact1986]

Will this stripeyness be included in sexual reassignment surgeries?

[A_Pigeon]

[QUOTE=Rhenae;44998862]Hmm I was always told it was more if a mosaic pattern, in random little patches rather than stripes?
I suppose ive mostly heard that in relation to the eyes though rather than skin (this is why women are less often colour blind, one x can carry colour blind ness but the other cells can accomodate)[/QUOTE]

it's more that the color blind gene is recessive and carried on the X chromosome and not the Y, so if there's another X it says stfu to the X with the colorblind gene.

but in men There's only one X so if you got a colorblind X you're done

[Rofl my Waff]

[QUOTE=MasterFen006;44999564]I hate how it takes only about a third of the entire video to explain the lines and why.[/QUOTE]

It was a lead in to an even more interesting question that you seem to have missed.

Epigenetics.

I listened to a talk about this once, where a town that experienced shortages of food to overabundances of food lead to offspring that averaged shorter lifespans than their grandparents simply because of the way their parents consumed food during their life. Which seems to go against conventional thinking of how our genes work.

Here it is

[url]http://www.telegraph.co.uk/science/10369861/Epigenetics-How-to-alter-your-genes.html[/url]
[quote]The Hongerwinter is one field of study. Another project focused on the inhabitants of Överkalix, an isolated town in northern Sweden. During the mid 1800s, the community was hit by several periods of intense famine when the crops failed. By studying the medical records found in parish registers, researchers were able to show that the population who went from a normal diet to overeating during a year of crop success produced grandchildren who experienced far shorter lives. And significantly too: a difference of around 32 years.[/quote]

[Karmah]

I thought this was going to be something totally different

Cool that it was one of the topics I learned of in genetics last year.
It explains the concept pretty good.

[A_Pigeon]

humans would be way cooler with stripes tbh, I hope we evolve visible ones soon

[alxnotorious]

I liked how the format of the video was like Vinesauce, only he didn't jump topics every 10 seconds.

[alexojm]

[QUOTE=Alxnotorious;45001820]I liked how the format of the video was like Vinesauce, only he didn't jump topics every 10 seconds.[/QUOTE]

You mean vsauce.

[Sirdownloadsalot]

[QUOTE=Alxnotorious;45001820]I liked how the format of the video was like Vinesauce, only he didn't jump topics every 10 seconds.[/QUOTE]

1. *Vsauce
2. The reason Vsauce jumps around on topics is because it's the format of his show. To present one idea and expand on multiple ideas connected to it. Rather then just following one trian of logic and answering a single question, he answers multiple.

[Gook Nukem]

The inactive X-Chromosome in a woman is called the [I]Barr Body[/I] and it was discovered by Murray Barr! The process that inactivates this Barr Body is called [I]lyonization[/I].

There's a rare condition that can occur in some people that causes the X-Chromosome activation in females to switch suddenly, meaning the inactive one activates and the active one deactivates, causing different genes to be expressed depending on which X-Chromosome they're on. I can't for the life of me remember what it's called, it's on the tip of my tongue. But basically, it can cause a woman with straight hair to suddenly start growing curly hair, for example, and then to grow straight hair again. It's also somewhat common for certain genes on the Barr Body to avoid lyonization and to continue being expressed.

There have been experiments with lyonization on mice(?) genetically engineered to have Trisomy 21 (Down's Syndrome) where lyonization was attempted on the extra chromosome, which resulted in partial reversal of the Down's Syndrome effects.

Genetics is really interesting and I encourage people to explore it! [img]http://i.somethingawful.com/forumsystem/emoticons/emot-science.gif[/img]