Justin evolution, we can now take ancient DNA, compare

Justin Smith

1/21/2018

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BIO182

Tonya Baxley

            With the ability to sequence genomes came new ways of
researching evolution, we can now take ancient DNA, compare it with the DNA of
organisms alive today to show ancestry, and even where the two changed in the
code that makes up everything biological. Evolution comes out of necessity where
only the ones who adapt survive, in the same sense evolution is faster under
duress or rapid change as compared to a fairly stable and unchanging
environment or life.

            As seen in the article the human genome has had multiple
insertions and deletions over its course from neandertal to now, but the
mutations, adaptations, and evolutions we have endured over our timeline has
slowed. This is because there really isn’t a reason to evolve further as of
now. This trend seems to strongly suggest and show a correlation between harder
times and evolution. The harder it is to survive, less of your species will
move on, but this allows for the “only the strong survive” in genetics. Desirable
traits that will help your offspring to survive and allow the continuity of the
species get passed on making that trait ever more present.

            The same trend can be seen elsewhere, especially (but
unrelated to the article) Staphylococcus aureus a common strain of staph
infection. This particular strain is becoming resistant to antibiotics, and
further supports the claims listed above, the survivors determine the fate of
the species whether microbiological or gigantic the baseline for evolution
remains the same… necessity to survive, those who adapt live, and those who can’t
die out.

References:

Chintalapati,
M., Dannemann, M., & Prüfer, K. (2017). Using the Neandertal genome to
study the evolution of small insertions and deletions in modern humans. BMC
Evolutionary Biology, 17(1), 179. doi:10.1186/s12862-017-1018-8

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