Race is a biologically misleading term. There is just one human race alive on this planet and it’s called Homo sapiens sapiens.
What English speakers are referring to as race is actually ethnicity.
The genetic variations between humans from different continents is far too little to make out different races.
There are no clear borders between one “race” to another.
Yes, I understood you the first time, but what does social construct mean?
Another race, that’s what humans deem too different from themselves to consider them equal. (Even though there are not enough genetic differences to qualify for an actual different race). But these differences are physical and not socially constructed.
Neurological differences between men and women aren't socially constructed any more than racial characteristics are. You should read up on the neurology of trans and cis people.