Recent Issues. Chapter 5: Genes and Behavior. Quote 4 Post author:B. F. Skinner Foundation Post published:December 28, 2018 Post category:Skinner's Quote of the Day “Because no other species has acquired operant control of the vocal musculature, it must have appeared very late, when human genetics had reached essentially its present state.” (p. 54) Subscribe to RSS feed here You Might Also Like Science and Human Behavior, Chapter 5: Operant Behavior, Quote 11 March 4, 2016 Science and Human Behavior, Chapter 10: Emotions, Quote 2 June 14, 2016 Science and Human Behavior, Chapter 11: Aversion, avoidance, anxiety, Quote 1 June 23, 2016