One way to assess whether a trait in males has a genetic basis is to determine how

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One way to assess whether a trait in males has a genetic basis is to determine how similar the measurements of that trait are among his offspring born to different, randomly chosen females. In a lab experiment, Kotiaho et al. (2001) randomly sampled 12 male dung beetles, Onthophagus taurus, and mated each of them to three different virgin females. The average body-condition score of offspring born to each of the three females is listed for each male in the following table.

Male 11 22 33 44 55 66 77 88 99 10 10 11 11 12 12 Offspring body-condition scores 0.82.0.82, 0.44.0.44,

ANOVA was used to test whether males differed in the mean condition of their offspring using the three measurements for each male. The results were SSgroups=9.940 and SSerror=4.682.

a. Is this a random-effects or a fixed-effects ANOVA? Explain the reason behind your answer.

b. What is the repeatability of the offspring condition of males mated to different females?

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The Analysis Of Biological Data

ISBN: 9781319226237

3rd Edition

Authors: Michael C. Whitlock, Dolph Schluter

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