Overtime, the ability to digest raw milk as adults becomes more common in a human population ... Select one: a. Natural selection acting on the dairy cattle. b. Natural selection acting on the human population. c. Increased mutation rate in a gene that affects lactose tolerance. d. Gene flow occurring between the human population and the cattle.
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Natural selection acting on the dairy cattle: This option is not relevant because the ability to digest raw milk is a trait in humans, not in dairy cattle. Show more…
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The ability to drink milk as an adult Group of answer choices is rare in humans and appears to be the result of genetic drift with no selective advantage. develops in individuals who are continuously exposed to milk as they grow older. probably evolved as an adaptation to the presence of dairy cattle. arose with the transfer of genes from dairy cattle into human groups via a mosquito vector.
Caroline J.
Many mammals become ill if they drink milk as adults even though they could consume it as babies. What causes this digestive issue?
A majority of humans (approximately 70%) cannot digest milk after childhood (lactase nonpersistent, also known as lactose intolerant), while some are able to digest milk as adults (they are lactase persistent or lactose tolerant). In areas of the world where humans raised cattle (cows), more humans are lactase persistent. Use what you just learned about the effects of natural selection and construct an explanation for why there are now more lactose-tolerant humans living in areas of the world where there are more cows. *Hint: What are the benefits associated with being able to consume milk and dairy products?
Madhur L.
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