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Unformatted text preview: Answers: 1. The selection differential, S = 16 - 15 = 1. The response to selection, R = S(h 2 ) = 1(.2) = .2 The neck length in the next generation is the mean of the parental generation plus the response (how do I know this?) and will be 15 + .2 = 15.2 inches 2. Since R = S(h 2 ) = mean of the offspring - mean of the parental generation, and if the mean of the offspring = 16 inches, then 16 - 15 = S(h 2 ) = S (.2) therefore 1/.2 = S = 5 inches. This means that Farmer Smith must have chosen breeders that had necks that were 5 inches longer than the parental generation as a whole, or 20 inches long. To do this he would have chosen fewer geese as breeders (because fewer geese will have this more extreme trait value)....
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This note was uploaded on 09/18/2009 for the course BIEB 120 taught by Professor Routman during the Spring '09 term at UCSD.
- Spring '09