Which discovery best supports the hypothesis that evolution of the lactase-persistence trait was driven by dairying, the use of milk as a source of adult nutrition in pastoralist cultures?Group of answer choicesPresent day milk fats and animal fats can be distinguished using carbon isotope analysis and gas chromatography.Ancient pots used to hold milk are about the same age as the lactase persistence mutations.The lactase gene is present in both humans and domesticated animals.Scientists have discovered unique mutations for lactase persistence in different cultures.
Question
Which discovery best supports the hypothesis that evolution of the lactase-persistence trait was driven by dairying, the use of milk as a source of adult nutrition in pastoralist cultures?Group of answer choicesPresent day milk fats and animal fats can be distinguished using carbon isotope analysis and gas chromatography.Ancient pots used to hold milk are about the same age as the lactase persistence mutations.The lactase gene is present in both humans and domesticated animals.Scientists have discovered unique mutations for lactase persistence in different cultures.
Solution
The discovery that best supports the hypothesis that the evolution of the lactase-persistence trait was driven by dairying is the fact that "Ancient pots used to hold milk are about the same age as the lactase persistence mutations." This suggests a correlation between the development of dairying and the emergence of lactase persistence in human populations.
Here's a step-by-step explanation:
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The hypothesis is that the evolution of the lactase-persistence trait was driven by dairying. This means that as humans began to consume milk as a source of nutrition in adulthood, those with the ability to digest lactose (a sugar found in milk) had a survival advantage and passed this trait on to their offspring.
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The discovery that ancient pots used to hold milk are about the same age as the lactase persistence mutations supports this hypothesis. If these two developments occurred at around the same time, it suggests that they may be related.
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The use of milk as a source of nutrition would have necessitated the development of lactase persistence. Without this trait, adults would not be able to digest lactose and would therefore suffer from digestive problems if they consumed milk.
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Therefore, the discovery of ancient milk pots of the same age as the lactase persistence mutations provides strong evidence in support of the hypothesis that dairying drove the evolution of this trait.
Similar Questions
After watching the “Got Lactase?” video, which statement would you say most accurately describes human evolution? Humans stopped evolving with the advent of modern medicine. Humans continued to evolve until the species adapted to pastoralism and agriculture, then we stopped evolving. Humans are still evolving and will continue to evolve through natural selection and the other evolutionary forces. Human evolution ended 200/300,000 years ago when humans (Homo sapiens) became a distinct species. Question 16Tips0.5 / 0.5 ptsWhich discovery supports the hypothesis that evolution of lactase persistence was caused by the use of milk in pastoralist cultures? Most human cultures today drink milk and most people worldwide are lactase persistent. The lactase gene is present both in humans and in domesticated animals. Ancient pots used to hold milk are about the same age as the lactase persistence mutations. Question 17Tips0.5 / 0.5 ptsWhy could drinking milk have provided strong favorable selection for lactase persistence? The mutations associated with lactase persistence increased in frequency in all populations around the world around 10,000 years ago. Genetic analysis suggests that the mutations associated with lactase persistence were passed down very slowly from generation to generation. In pastoralist populations, individuals with the lactase-persistence mutations were more likely to survive, reproduce, and pass on their alleles than people without the mutations, especially in times of famine. Question 18Tips0.5 / 0.5 ptsThe evolution of lactase persistence has both a cultural and genetic component. True False IncorrectQuestion 19Tips0 / 0.5 ptsGeneticists have identified a single mutation for lactase persistence that originated in Europe and later spread to other parts of the world. True False Question 20Tips0.5 / 0.5 ptsWhen do most animals stop producing lactase? most animals continue to produce lactase their whole lives at weaning when they are adults at birth Quiz SubmissionsAttempt 1: 7This quiz has unlimited attempts Back to Quiz
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