An increasing population has increasing genetic diversity or “genetical richness”.
If you think the human population was once two individuals then the maximum genetic diversity at any loci was four. There is a lot more than just four alleles at many loci. Where do you suppose this “genetical richness” came from?
==genetical is not a word that biologists use
Gene Expression to Genetical Genomics
Gene Expression to Genetical Genomics is an open access, peer reviewed journal, which covers all aspects of gene and genome expression and its effect in resulting phenotypes.
http://www.la-press.com/gene-expression-to-genetical-genomics-journal-j137