HARRIET HEMINGS? DAUGHTER OF SALLY and THOMAS JEFFERSON?

 So identified on a Pinterest site.  That a person could be mostly Caucasion (be it appearance or DNA) and still be a slave is more mystifying to us presently than it was back in the day.  Sally's father was Thomas Jefferson's wife's father too.  Sally may have also been "mulatto" - biracial. I notice that there are a lot of people making YouTube videos of the results of their DNA ancestry tests.  I wonder if these informational moments are actually backed by one of the DNA test companies. 

Update August 2021.  I learned a slave was a slave based mostly on the mother's status.