Suppose that a species of fish has split into two populations in a lake: one on the eastem side and one on the western side. How could you determine whether the two populations constitute different species?

Question

Suppose that a species of fish has split into two populations in a lake: one on the eastem side and one on the western side. How could you determine whether the two populations constitute different species?

(1 point)

Examine the populations for morphological, color, or other physical differences

Examine the populations for different genetic markers and allele frequencies.

Attempt to breed members from the two populations in captivity.

Introduce members from one population into the other population's habitat to see if they interbreed.

Answer 1

The most effective way to determine whether the two populations constitute different species would be to examine the populations for different genetic markers and allele frequencies. This would provide a more reliable and scientific basis for determining whether the populations have evolved to the point of being considered separate species. However, examining morphological, color, or other physical differences could also provide important information to consider in conjunction with genetic analysis. Attempting to breed members from the two populations in captivity or introducing members from one population into the other population's habitat could provide additional insights into whether the populations are reproductively isolated and potentially on their way to becoming distinct species.