Hank and his brother John discuss heredity via the gross example of relative ear wax moistness. Crash Course Biology is now available on DVD! http://dftba.com/product/1av/CrashCourse-Biology-The-C...
========== So, I have this brother, John. You may have
heard of him.JOHN: Hi there!HANK: As it happens, John and I have the exact
same parents.JOHN: Yes, Mom and Dad Green.HANK: And since we have the same parents,
it's to be expectedthat John and I would have similar physical
characteristicsbecause the source of our DNA is exactly the
same.JOHN: Hank and I share some genes, but nobody
knew anything about chromosomes or DNA untilthe middle of the 20th century. And people
have been noticing that brothers tend to lookalike since like, people started noticing
stuff or whatever.HANK: That was very scientific, John.JOHN: I will remind you that I am doing you a favor.Heredity: it's basically just the passing
on of genetic traits from parents to offspring.Like John ...
