Question: Practice Problems A rabbit farmer is interested in improving his profts by increasing the weight …

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Practice Problems A rabbit farmer is interested in improving his profts by increasing the weight of his rabbits. His rabbits have an average weight of about 3kg. He decides try improving their weight by genetically selecting the largest rabbits. He selects his 10 largest rabbits that have an average weight of 4kg and he interbreeds them. A. What size would you predict the progeny of these large rabbits will be if narrow sense heritability is 0%? B. Suppose after conducting the experiment he estimated h2 to be 70%. From this he erroneously concludes that 70% of his rabbit's weight is due to genes and 30% is due to the environrment. What would be a better understanding of the meaning of 70% heritability? C. If h2 were 70%, what would be the average weight of the progeny of his 10 largest rabbits? 3. Com plants of a particular population average 180 cm in height. Narrow sense heritability of this trait is 0.5. If a breeder selected plants that were 10 cm taller than the average plant and interbred them, what would be the expected height of the next generation? 4. Drosophila can be trained to avoid certain odors (olfactory cues). The flies can be electrically shocked each time they are exposed to the odor (a training exposure). Eventually they learn to avoid the odor without the shock Some fies leam fast (after as few as 2 electric treatments) while other flies take many electric treatments before avoiding the odor. Suppose you had a population where the mean training exposures required was 8.5. Suppose you selected fies that leamed quickly (mean of 6.5 training exposures) and interbred them and found that their progeny required a mean of 7.5 training exposures before learning to avoid the odor. What is the narrow sense heritability of this trait in this population? Ð². kilog 633, bod