Question

1. . It has been stated that “species form a boundary for gene flow”. What does this mean? Are there exceptions to this statement? Explain.

2. Your text points out that gene flow between some prokaryote species can lead to speciation, while gene flow between eukaryote populations prevents speciation. How does this work? Explain.

Answer 1

1. as the gene flow refers to the transfer of the genetic information from one breeding population to other population of same species at different isolated regions , that is why it is said that species form a boundary for gene flow .

yes , as the researchers studied further, it was found that parapatric cryptic species /taxa/sisters are the exception to this rule .these species even after long term isolation with different characterics are still compatible across their area of contact.