A misunderstanding however has led some to believe that Coon supported parallel evolution or polygenism ; this is not true since Coon 's evolution model still allows for gene - flow .
Coon did not stress evolution model .
A misunderstanding however has led some to believe that Coon supported parallel evolution or polygenism ; this is not true since Coon 's evolution model still allows for gene - flow , although he did not stress it .