Question

multiple choice 1 point
which of the following statements is not directly supported by dna and geographic evidence we studied in class?
directly supported means that you can point to specific evidence from the work we did in class to justify the statement.
populations that share many alleles are likely exchanging genes by mating with one another.
populations of the same species that are close together are always genetically identical.
dna sequence data can be used to build phylogenetic trees, which are models that represent relatedness between groups.
populations that are isolated from other groups of the same species have more genetic differences over time.
previous

Explanation:

• Option 1: Populations sharing alleles likely exchange genes via mating. DNA and geographic evidence (like isolation affecting gene flow) support this.
• Option 2: DNA sequence data builds phylogenetic trees (models of relatedness). This is a standard use of DNA evidence.
• Option 3: Isolated populations (geographic isolation) accumulate more genetic differences over time. DNA can show these differences.
• Option 4: Populations of the same species close together aren't always genetically identical. Geographic barriers (even small ones) or mutation can cause genetic variation. DNA evidence shows genetic diversity within species ranges.

Answer:

Populations of the same species that are close together are always genetically identical.