Human digestive evolution

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Introduction=

Select a topic about genetics or evolution in a specific organism or ecosystem.
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Colony of Marburg virus. Transmission electron microscope image taken by Dr. Tom Geisbert


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Section 1 Genetics

Include some current research, with at least one image.

Sample citations: [1] [2]

A citation code consists of a hyperlinked reference within "ref" begin and end codes.

Perhaps one of the highest-impact short-term genetic digestive change has been the evolution of a Lactase-permanence gene (LCT). The separate incidences of LCT mutants that were positively selected for vary by region and ethnicity. These range in age from 8,000-9,000 years ago (European Populations) to 2,700-6,000 years ago (African Populations). Howvever, on average, the lactase mutation is present at much lower frequencies in African populations versus European or Middle Eastern populations. This results in higher average rates of lactose intolerance within said population. [3]

Section 2 Microbiome

Include some current research, with a second image.

Recent research suggests that the composition of a person's microbiome may affect their ability to digest lactose to an extent. Though the sample study is notably small (8), it seems that, in part, transplanting certain beta-galactosidase expressing cultures (Such as L. acidophilus) may, in fact, reduce the severity of symptoms. Because of the incredibly early state of research on the topic, it is too early for any definitive trends or statements to be stated with much confidence [4]

Conclusion

Overall text length should be at least 1,000 words (before counting references), with at least 2 images. Include at least 5 references under Reference section.


References


Edited by [Daniel Frank], student of Joan Slonczewski for BIOL 116 Information in Living Systems, 2019, Kenyon College.