Campbell Biology (11th Edition)
Campbell Biology (11th Edition)
11th Edition
ISBN: 9780134093413
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece
Publisher: PEARSON
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Chapter 51, Problem 51.2CR
Summary Introduction

To review: The differences between imprinting that occur in geese with the song development in sparrow.

Concept introduction: The behavior of the offspring is largely influenced by the environment in which it completes its development.

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what are genetics vs enviromental factors that leads to the development of spatial learning abilities in Clark's nutcracker and Scrub Jays?
Peter Boag, studied the inheritance of beak depth in Galapagos finches by looking at the relationship between parent beak depth (in mm) and that of their offspring.  He collected two sets of parent offspring data, once in 1976 and again in 1978.  For both years he followed birds to determine which pairs belonged to which nests. Most of the parents had been previously captured so their beak depths were known.  He then captured the offspring when they fledged and measured their beak depth.  He calculated the "midparent" beak depth (the average beak depth of the two parents) and then compared that to beak depth of their offspring. Here is what he found in 1976:   Assume that in 1978, all the finches with beak depths less than 9.0 mm died due to prolonged drought. Use your knowledge of how quantitative traits respond to selection and the following relationship, R = h2S, to determine the following: Selection differential.                                                 Predicted response…
A region of the canary forebrain shrinks during the nonbreedingseason and enlarges when breeding season begins. This change isprobably associated with the annual(A) addition of new syllables to a canary’s song repertoire.(B) crystallization of subsong into adult songs.(C) sensitive period in which canary parents imprint on newoffspring.(D) elimination of the memorized template for songs sung theprevious year.
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