Three species are endemic to a group of islands and are all descended from species 4, a large population mainland species (it has no post-founder new mutations). Species 4 is the sister taxa of species 5, which is frugivorous. Species 1 and 3 are insectivorous and species 2 and 4 are frugivorous. The gene sequence of a 10-nucleotide locus for these species are: Species 1: GCTGATGAGT Species 2: ATCAATGAGT Species 3: GTTGCAACGT Species 4: GTCAATGACA Would it matter if this locus was under selection or selectively neutral; why or why not?

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Q: Species A X Species B X X Species C X X X Species D X X X Species E X X X X X Species F X X X X X

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A: The answer is given below.

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Genetic Evolution

Sexual reproduction produces distinct population variations. Heredity determines the traits and qualities to be passed down to the progeny. Over time, this variation within-species is also affected by the process of human evolution. The study of how genetic variation leads to evolutionary changes is known as genetic evolution. If a trait helps an organism to survive and reproduce, it is more likely to be passed down the generations. It is rare that such traits result in a completely distinct set of traits in descendants than the ancestral population; this can result in the emergence of a new species.