Postbutterfly_exercise_Answers - Name:_ TA: _ Section: _...

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1 Name:__________________________________ TA: ________________ Section: ____ C OLLECTIONS L AB – N ORTHERN F LICKERS / L IMENITIS B UTTERFLIES ANSWERS WORKSHEET Due in section, November 27-29, 2007 Attach your graph(s) to this page and answer the questions below. 1) Briefly describe the traits you measured, including discussion of any problems that you encountered in making the measurements. Answers will vary, but some discussion of subjectivity is certainly appropriate. 2) Describe the patterns you see in your graphs. Do the data suggest this is a primary or a secondary hybrid zone? Explain your reasoning. The character clines coincide geographically. The contact zone appears to be a secondary hybrid zone, because both character frequencies change drastically in the same, small range of latitudes/longitudes. If the contact zone is a primary hybrid zone, changes in character frequency (character clines) would be associated with different environmental gradients and hence, different latitudes/longitudes. Therefore, changes in frequency of each character would be located at
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Postbutterfly_exercise_Answers - Name:_ TA: _ Section: _...

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