Emil O W Kirkegaard

Supernumerary finger count is probably close to 100% heritable. https://en.wikipedia.org/wiki/Polydactyly#Causes … @KirkegaardEmil

Subnumenary count less so because sometimes caused by accidents, but also major genetic variation. https://en.wikipedia.org/wiki/Oligodactyly … @KirkegaardEmil

General rule: if something evolved, it has genetic variation, & thus heritability > 0. @KirkegaardEmil

Prenatal alcohol runs in families but is not genetic. Tough to know GenRul if no one does studies bc gestation too political

There's no need to overfuse me with your interest in FAS. And surely FAS is heritable too because drinking is. @JamboJanet

Sorry to overfuse (?),but one cannot get FASD unless mom drinks during pregnancy. So, not heritable,but runs in families.

FAS might not exist: http://www.unz.com/jman/features-and-bugs/#comment-1341629 … @KirkegaardEmil

Very disturbing.Scientists? I fear for this society where nonsense can rise to the top. https://videocast.nih.gov/summary.asp?live=10172&bhcp=1 …

@hbdchick The Wikipedia article is plain wrong. Teratogenic toxins are the main cause.

What Wikipedia article is wrong? Seem to be replying to the wrong tweet. @timrogers2016 @hbdchick

It's says oligodactyly is usually genetic, but in the past 50 yrs toxins such as thalidomide have been the problem

And we know this how...? You are pretty short on citations when making claims. Do you have a review? @timrogers2016 @hbdchick

Yes, and still you produce no relative estimates... How many children get these from genetic causes? @timrogers2016 @hbdchick

Do note that thalidomide use is presumably heritable too, so some of the numbers you give reflect genetic causation @timrogers2016 @hbdchick

at population level, as compared to people that lose fingers on accidents etc.?