Describe what causes the genetic occurrence of lactose intolerance and how it is related to cultural subsistence strategies.

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Accepted Answer

∻Answer∻ ⚹ Lactose intolerance is caused by a decrease in lactase enzyme activity, which is genetically determined and can be related to cultural dietary practices. ⚹ ∻Solution∻ ‖ a ⋮ Genetic basis of lactose intolerance: The condition is primarily caused by the reduction in the activity of the enzyme lactase, which is needed to digest lactose found in dairy products. This reduction is due to a decrease in the expression of the LCT gene that encodes the lactase enzyme, often after weaning. ‖ ‖ b ⋮ Lactase persistence and cultural practices: In some populations, a genetic mutation has led to lactase persistence, where the production of lactase continues into adulthood. This mutation is thought to have provided an evolutionary advantage in cultures where dairy farming and the consumption of milk were common, leading to a higher frequency of lactase persistence in these populations. ‖ ∻Key Concept∻ ⚹ Genetic variation in the LCT gene ⚹ ∻Explanation∻ ⚹ The genetic variation in the LCT gene determines lactase production and thus the ability to digest lactose, which is influenced by cultural dietary practices. ⚹◊What is the role of the LCT gene in determining lactose intolerance and how does it vary among different populations based on their history of dairy consumption?⍭ Generate me a similar question◊

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