MIKE TYSON Good Genes OR GOOD DOCS?

1127_mike_tyson_good_genes_launchMike Tyson's face is a knockout!

Here's the 22-year-old version of the undisputed heavy-weight champ at a gala in Beverly Hills back in 1988 (left) -- and 25 years later, the 47-year-old one-man show at his book signing in Los Angeles earlier this year (right).

The question is...