EEMB_2_Final_Ivory

# The estimated heritability of the 6 w is a 03 b 025 c

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36. The estimated heritability of the 6 w is: A. 0.3 B. 0.25 C. 0.5 D. 0.80 E. None of these answers is correct 37. If parents with the highest 5% of 6 w values had an average 6 w that was 50, then their children would be expected to have a 6 w value averaging: EEMB 2 Final Ivory Version: 0 Page: 11

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38. If a mother had a 6 w of 50 and the father had a 6 w of 70, then the expected average 6 w for their children would be: 39. If a plot were made of the average 6 w of parents (X) and average 6 w of their adopted offspring (Y) from 1,000 families, then the expected slope of the best-fitting line to these data (Y vs. X) would be : 40. Suppose that a new study showed that adopted children of foster parents with high 6 w values have average 6 w values that were higher than 10. This information would indicate that our estimate for the heritability of the 6 w (calculated and used in the above problems) would be: A. too low B. unaffected C. too high D. zero E. None of these answers is correct EEMB 2 Final Ivory Version: 0 Page: 12
Use the following information for the next 5 questions (until you see a solid line): Alligators lay their eggs inside nests composed of mounds of rotting vegetation. The sex of their offspring is determined by the temperature that the eggs experience during incubation. Cooler temperatures ( <30º C) lead to all males and warmer temperatures (>34º C) to all females, and intermediate temperatures produce intermediate sex ratios with 32º C producing 50% females. Females can influence the sex ratio of their offspring by the height of fermenting vegetation they use to bury their eggs, with higher mounds of vegetation producing hotter incubation temperatures and more females. You can assume that the behavior “stacking fermenting vegetation on the nest” is an instinctive phenotype that can be influenced by genetic variation in the alligator population. You also can assume that nest construction is controlled by three alleles segregating in the gene pool and that each allele causes the alligators to stop nest construction at a different mound size (e.g., height) and thereby incubate their eggs at different nest temperatures: mutation-A at 31º C, mutation-B at 32º C, and mutation-C at 33ºC. Unless otherwise indicated, you can assume the alligators do not inbreed.

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