Their behavior is determined by looking up what their eye senses in a genetically inherited array of probabilities.
(Their behavior; is determined; by looking up what their eye senses in a genetically inherited array of probabilities) (Their behavior; by looking up; what their eye senses in a genetically inherited array of probabilities)
Their behavior Their behavior
is determined by looking up
by looking up what their eye senses in a genetically inherited array of probabilities
what their eye senses in a genetically inherited array of probabilities