See: Himalayan rabbits. https://www.nature.com/scitable/topicpage/environmental-influences-on-gene-expression-536/#:~:text=Gene%20C%20controls%20fur%20pigmentat

See: Himalayan rabbits. https://www.nature.com/scitable/topicpage/environmental-influences-on-gene-expression-536/#:~:text=Gene%20C%20controls%20fur%20pigmentation%20in%20Himalayan%20rabbits.&text=This%20temperature%20regulation%20of%20gene,be%20white%20(Figure%201) https://www.nature.com/scitable/topicpage/environmental-infl....