Were you lied to in your genetics class?

There's a disturbing trend in popular science these days. The goal is to convince the general public that much of what we thought we knew is wrong. I think it's related to the general mistrust of science.

A recently posted YouTube video tries to make the case that you were lied to about genetics. I'll get to than in a little while but first let me summarize what I was taught in a university genetics class in 1965.