Transcript

Stanford University. Push off into new terrain here yet another bucket. But before doing that various bits of feedback from Office Hours hearing from TAS getting a sense of where the grand gaping craters of confusion are so far, and apparently an awful lot of them were provided in the last few days of lectures with behavior, genetics, various issues that came up, clearly one of the most complicated, inaccessible subtle pain in the neck concepts in the whole class, which is this heritability business.

So memorize the following two sentences, because it all comes down to the difference between something that is inherited, and how heritable a trait is. The fact that humans overwhelmingly have five fingers reflects the fact that the number of fingers is an inherited trait. The fact that when there are some circumstances of humans having other than five fingers, it is overwhelmingly due to environmental something or others is an indication of the fact that nonetheless, very ability around the number of five fingers heritability is essentially 0%. So get those two sorted out, and you have those two concepts all under your belt, and very useful. Why is it useful?