C Biology question cheg x e- e moodle wilkescc.edu mod/quiz/attempt.php? attempt
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C Biology question cheg x e- e moodle wilkescc.edu mod/quiz/attempt.php? attempt 27229 6 WCC/Moodle Brianna Winebarger WILKES COMMUNITY BIO-110-01-SP17-Principles of Biology COLLEGE Dashboard BIO-110-101-SP17 Unit 2 Module Exam 3 Exam 3 QUIZ NAVIGATION Question 7 The coat color in a Siamese cat is determined by a temperature-sensitive allele that allows the brownish pigment melanin 1 2 3 4 5 6 7 8 9 10 Not yet answered to be produced in extremities of the body. What might explain this phenomenon? 11 12 13 14 15 16 17 18 19 20 Points out of 1.34 Select one P Flag question 21 22 23 24 25 26 27 28 29 30 O a. Siamese cats evolved in warm climates and did not need melanin. 31 32 33 34 35 36 37 38 39 40 O b. Melanin appears darker in extremities because less light is reflected. 41 42 43 44 45 46 47 48 49 50 O c. Extremities in a cat are more prone to damage from sunlight. 51 52 53 54 55 56 57 58 59 60 d. Alleles are used to produce proteins that function best in specific temperature ranges. 61 62 63 64 65 66 67 68 69 70 Finish attempt Moodle Docs for this page You are logged in as Brianna Winebarger (Log out) BIO-110-101-SP17 2 8:11Explanation / Answer
The answer is D.
For explanation find the below paragaraph
The color variation of the Siamese is is found to be albinism. It’s the result of a mutation in the TYR gene which produces an enzyme called tyrosinase. This enzyme is directly involved in the production of melanin and it's heat sensitive in its mutated form. While this enzyme does not react to normal body temperatures, it does develop darker in colder temperatures. The coloring can almost be viewed as a heat map of the cat's body. This gene also affects the eyes, which are always blue. The cat’s light underside gradually turns to a medium color on the back and quite a bit darker on the ears, legs, face and tail. Siamese cats in cooler temperatures typically have darker points than those living in warm climates.
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