Heliconius butterflies do not all look the same even within ones species--they have different wing colors. These butterflies have the same adaptive poison to ward off predatory birds. Heliconius butterflies of different wing colors face no barriers to mating like humans.
The Human Genome Project was completed in the year 2000 [according to this documentary]. Bill Clinton declares that all human races are 99.9% the same. Human and chimpanzee genomes differ by about 3%.
John Hawks says that individuals with attention and focus problems are more likely to have more DRD4 genes.
Stanley Coren has determined that the Border Collie is a very intelligent dog breed.
Linda Gottfredson has found that even siblings have different levels of intelligence.
1. Interviewed experts: Andrew Brower, John D. Hawks, Stanley Coren, Linda Gottfredson, Simon Laughlin, Peter Ward (paleontologist), Alex Pentland.
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