Fig. 7From: During evolution from the earliest tetrapoda, newly-recruited genes are increasingly paralogues of existing genes and distribute non-randomly among the chromosomes(A) The Zinc Finger (ZNF) genes of the human genome as a function of phylostratum age (left) or as their chromosome location (right); (B) similarly for the Keratin-Associated Protein (KRTAP) genes; (C) similarly again for the Olfactory Receptor (OR) genesBack to article page