Biologist Luana Maroja on An Existential Threat to Doing Good Science:

The restriction of academic freedom comes in two forms: what we teach and what we research.

Let’s start with teaching. I need to emphasize that this is not hypothetical. The censorious, fearful climate is already affecting the content of what we teach.

One of the most fundamental rules of biology from plants to humans is that the sexes are defined by the size of their gametes—that is, their reproductive cells. Large gametes occur in females; small gametes in males. In humans, an egg is 10 million times bigger than a sperm. There is zero overlap. It is a full binary. 

But in some biology 101 classes, teachers are telling students that sexes—not gender, sex—are on a continuum. At least one college I know teaches with the “gender unicorn” and informs students that it is bigoted to think that humans come in two distinct and discrete sexes. 

In biology 101???

That’s insane.

Even medical schools and the Society for the Study of Evolution have issued statements suggesting that sexes are on a “continuum.” If this were true, the entire field of sexual selection would be baseless, as its bedrock insight lies in the much larger female investment in reproduction, explaining the demonstrated choosiness in females (who have more to lose) and competitiveness in males (the “abundant” sex in most species, one male can fertilize multiple females). Published papers (see here, for example) ask us to be “inclusive” by limiting the sex discussion to the few species of algae and protists (such as amoebas) that have equal size gametes—even when that has no relevance to any animal or vascular plant. 

Hmm. Maybe if we campaigned hard enough we could change the rules – make it so that the sexes really are on a continuum. Worth a try, don’t you think? And screwing up biology teaching forever?