Is there a biological basis for different races?

https://youtu.be/X4iKEyXcVFM
We ask Dr. Hessam Nowzari. Dr. Hessam Nowzari graduated from the University of Brussels in Belgium, University of Rennes in France, and University of Southern California, Advanced Periodontics program. PhD in Biology & Health Sciences, Director of Advanced Periodontics at USC from 1995 to 2012 and a Diplomate of the American Board of Periodontology. He is the organizer of “Nowzari Symposiums” in Beverly Hills: nowzarisymposium.com. He has 150 publications, 82 on PubMed.