Question

which of the following is an example of gene flow?
○ the introduction of burmese pythons, with no known predators or compatible mates, into the florida everglades
○ the passage of a recessive disease - causing allele from one generation to the next without the physical appearance of disease
○ selective breeding of dairy cows to produce animals that can live in tropical climates and yield higher volumes of milk
○ cross pollination by migrating honey bees between two geographically separate but genetically identical cotton fields
○ the carriage of seeds between two separate urban forests by wildlife such as squirrels and rats that travel back and forth between the two

Explanation:

Gene flow involves the transfer of genetic material between populations. The carriage of seeds (which contain genetic material) between two separate urban forests by wildlife connects the two plant populations, transferring genes—this fits the definition of gene flow. The other options do not: Burmese pythons with no compatible mates cannot transfer genes; passage of a recessive allele within a generation is inheritance, not inter-population flow; selective breeding is artificial selection; cross-pollination between genetically identical fields does not introduce new genetic material between distinct populations.

Answer:

the carriage of seeds between two separate urban forests by wildlife such as squirrels and rats that travel back and forth between the two