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  2. Lactase persistence - Wikipedia

    en.wikipedia.org/wiki/Lactase_persistence

    Therefore, lactase persistence is often cited as an example of both recent human evolution [15] and, as lactase persistence is a genetic trait but animal husbandry a cultural trait, gene-culture coevolution in the mutual human-animal symbiosis initiated with the advent of agriculture.

  3. Recent human evolution - Wikipedia

    en.wikipedia.org/wiki/Recent_human_evolution

    Lactase persistence is a rare ability among mammals. [74] Because it involves a single gene, it is a simple example of convergent evolution in humans. Other examples of convergent evolution, such as the light skin of Europeans and East Asians or the various means of resistance to malaria, are much more complicated.

  4. Inborn errors of carbohydrate metabolism - Wikipedia

    en.wikipedia.org/wiki/Inborn_errors_of...

    In most mammals, production of lactase diminishes after infants are weaned from maternal milk. However, 5% to 90% of the human population possess an advantageous autosomal mutation in which lactase production persists after infancy. The geographic distribution of lactase persistence is concordant with areas of high milk intake.

  5. Dual inheritance theory - Wikipedia

    en.wikipedia.org/wiki/Dual_inheritance_theory

    Lactase persistence One of the best known examples is the prevalence of the genotype for adult lactose absorption in human populations, such as Northern Europeans and some African societies, with a long history of raising cattle for milk.

  6. Niche construction - Wikipedia

    en.wikipedia.org/wiki/Niche_construction

    A well-researched example is the finding that dairy farming created the selection pressure that led to the spread of alleles for adult lactase persistence. [30] Analyses of the human genome have identified many hundreds of genes subject to recent selection, and human cultural activities are thought to be a major source of selection in many cases.

  7. Evidence of common descent - Wikipedia

    en.wikipedia.org/wiki/Evidence_of_common_descent

    Lactase activity persistence in adults is associated with two polymorphisms: C/T 13910 and G/A 22018 located in the MCM6 gene. [191] This gene difference eliminates the shutdown in lactase production, making it possible for members of these populations to continue consumption of raw milk and other fresh and fermented dairy products throughout ...

  8. Lactase - Wikipedia

    en.wikipedia.org/wiki/Lactase

    Lactase (EC 3.2.1.108) is an enzyme produced by many organisms and is essential to the complete digestion of whole milk.It breaks down the sugar lactose into its component parts, galactose and glucose.

  9. Simple Mendelian genetics in humans - Wikipedia

    en.wikipedia.org/wiki/Simple_Mendelian_genetics...

    Mendelian traits behave according to the model of monogenic or simple gene inheritance in which one gene corresponds to one trait. Discrete traits (as opposed to continuously varying traits such as height) with simple Mendelian inheritance patterns are relatively rare in nature, and many of the clearest examples in humans cause disorders.