Question

2. Consider the contribution of the following gene to running speed in Alaskan huskies. We examine the following population of huskies and find: Genotype Average Speed Relative Frequency A1A1 6.0 m/s 0.15 A1A2 9.0 m/s 0.36 A2A2 12.0 m/s 0.49. I have A-C answered if someone can check over it... and need the answer to D
a. Calculate the mean running speed in this population of huskies. (6.0)(0.15) + (9.0)(0.36) + (12)(0.49) = 0.9 + 3.24 + 0.49 = 10.02 m/s
b. Assume that no dominance effects are present and calculate the additive genetic variance (VGA) in running speed for this population. Mu = 10.02 VGA = P(x11 – mu)2 + H(x12 – mu)2 + Q(x22 – mu)2 = 0.15(6-10.02)2 + 0.36(9-10.02)2 + 0.49(12-10.02)2 =2.42 + 0.375 + 1.92 = 4.72
c. If the phenotypic variance (VP) for running speed is 6.74 m/s, and you have a big kennel where you can raise plenty of husky pups, will you be able to use artificial selection to improve running speed in your population of huskies and potentially win the Iditarod? Why or why not (defend your answer mathematically)?
d. If you feed your husky pups a high protein and nutritional diet, will this have an impact on their running speed? Why or why not?

Answer 1

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