2 What happens to the lactase gene after a baby is weaned off of its mothers

2 what happens to the lactase gene after a baby is

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2. What happens to the lactase gene after a baby is weaned off of its mother’s milk. (1pt) a. The gene mutates b. The gene product (enzyme) is marked for destruction c. The gene is turned of d. The gene is silenced using short double stranded RNA e. The gene disappears 3. What are the symptoms of a person who is lactose intolerant ? What causes these symptoms? (1pt) This person may experience stomach cramps or diarrhea if they consume lactose. This occurs because the body cannot break down the lactose to be absorbed by the body. 4. What is another term to describe a person who is lactose tolerant ? Why is this a more descriptive term? (1pt) Lactose persistence. This is more descriptive because the body persists in having the gene on when it would normally be turned off. 5. Where do we find a predominance of lactase persistent people? (1pt) a. Eastern Europe and Asia b. The Americas c. Middle east only d. Northern Europe and some parts of Africa e. Northern Europe only 6. What archeological evidence supports Dr. Tishkoff’s research dating the mutation? (1pt) Archeological evidence that supports it includes that during cattle domestication time periods, the lactase persistent allele arose around the same time in Europe and Africa. This graded assignment is subject to the Virginia Tech Honor Code. Sharing or posting any content from this assignment, or using such shared or posted assignment content to answer assignment questions, is a violation of the Virginia Tech Honor Code. 3
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BIOL 1106 Classwork Spring 2019 7. Why would individuals in an agrarian (farming) society benefit from having the lactose tolerance mutation? (Note: owning cows is not a benefit) (2pts) Since farm owners have cows and goats, the milk they produce is most readily available and cheap. In order to consume this good, they would need to be lactose persistent. Also, cheeses are made from these milks and prevalent on farms, so it would greatly reduce the diet of a farmer if they were lactose intolerant. Part III: Hormones that regulate the digestive system (LO 8, S1, S3, S6) You were asked to read the following research article before class: Spiegel, K., Tasali, E., Penev, P. and van Cauter, E. Brief Communication: Sleep Curtailment in Healthy Young Men Is Associated with Decreased Leptin Levels, Elevated Ghrelin Levels, and Increased Hunger and Appetite Annals of Internal Medicine, 12/2004, Volume 141, Issue 11 Answer the following questions concerning the article. You may reference the article at any time to help you.
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