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PREVIEW MATERIAL FOR Exam 3 - Spring 2015(April 13, 2015)

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Use a #2 pencil to fill in the information on your NCS answer sheet. Put your O-Key Account Username in the boxes indicated for LAST NAME and darken the appropriate circles. Write your Name (Last, First) and "Star" or "NoStar"in the space above the boxes containing your O-Key Account Username. Darken the (S) or (N) in the last column of the name circles. Enter the number 1513 and darken the corresponding circles in the first 4 columns of the "Student ID." Failure to perform this correctly will incur a -10pt handling fee. Read all questions and answers carefully before choosing the single BEST response for each question. Feel free to ask the instructor for clarification.

Smuf Source

In the Land of the Smurfs, blue skin color is common, even though it is an autosomal recessive trait. Smurf physicians call this condition methemoglobinemia. Diaphorase is an enzyme responsible for the normal conversion of methemoglobin (a bluish protein) to hemoglobin (a protein that is red when carrying oxygen in the blood). Some researchers hypothesize that methemoglobinemia is caused by a decrease or lack of diaphorase enzyme, causing the skin to appear blue.

On the Smurf Farm dwell Papa & Mama; Auntie & Uncle and 5 Smurf cousins: Smidgen, Scooter, Smore, Silky and Smooth. Slinky, a pink-skinned Smurf from another village, wants to marry Silky, a daughter of Uncle and Auntie. A significant number of Smurfs in the community are also color-blind, an X-linked recessive trait. Phenotypes for these Smurfs are listed above. When they were children, Uncle and Auntie Smurf were both vaccinated against the Smurf Infective Convulsive Coughing (SICC) virus.


Elysia timida

Farm Source

By the early 20th century, gray wolves were extinct within Yellowstone National Park. In 1995 the U.S. Fish and Wildlife Service released Canadian gray wolves into Yellowstone, and calculated their population density. The wolf density was measured again ten years (one decade) later. Several interesting biological processes and interactions occur within Yellowstone National Park. As a pack of wolves chases a herd of deer through the forest, they rely heavily on blood flow and muscle contractions to catch the fast deer. A curious wolf pup was stung by a scorpion, causing his nose to become numb. Yellowstone National Park is sometimes affected by severe wildfires. Deer and other herbivores have gut bacteria that help digest plant material.

Pigs are diploid animals with 38 chromosomes. Coat color in pigs is encoded by the extension coat color gene that regulates the synthesis of eumelanin (black) and phaeomelanin (red/yellow). The gene is 948 base pairs long. A mutation in the middle of the gene changes the codon from GCG to GTG. Pigs that are e/e have a red coat, whereas animals with an E allele have a black coat.

Elysia timida


Garden slug