Justin Smith1/21/2018BIO182Tonya Baxley With the ability to sequence genomes came new ways ofresearching evolution, we can now take ancient DNA, compare it with the DNA oforganisms alive today to show ancestry, and even where the two changed in thecode that makes up everything biological.
Evolution comes out of necessity whereonly the ones who adapt survive, in the same sense evolution is faster underduress or rapid change as compared to a fairly stable and unchangingenvironment or life. As seen in the article the human genome has had multipleinsertions and deletions over its course from neandertal to now, but themutations, adaptations, and evolutions we have endured over our timeline hasslowed. This is because there really isn’t a reason to evolve further as ofnow. This trend seems to strongly suggest and show a correlation between hardertimes and evolution. The harder it is to survive, less of your species willmove on, but this allows for the “only the strong survive” in genetics. Desirabletraits that will help your offspring to survive and allow the continuity of thespecies get passed on making that trait ever more present. The same trend can be seen elsewhere, especially (butunrelated to the article) Staphylococcus aureus a common strain of staphinfection.
This particular strain is becoming resistant to antibiotics, andfurther supports the claims listed above, the survivors determine the fate ofthe species whether microbiological or gigantic the baseline for evolutionremains the same… necessity to survive, those who adapt live, and those who can’tdie out.References:Chintalapati,M., Dannemann, M.
, & Prüfer, K. (2017). Using the Neandertal genome tostudy the evolution of small insertions and deletions in modern humans. BMCEvolutionary Biology, 17(1), 179. doi:10.1186/s12862-017-1018-8