Poster  Presentation  for  Chapter  17  –  Evolution  of  Populations  (Speciation)     Working  with  your  group,  you  will  choose  1  item  from  each  category  to  present  via  scintillating  poster.   Each  item  has  its  own  requirements,  including  questions  to  be  answered.  Please  read  the  requirement  for   your  choices  carefully!  Instructions  for  the  poster  are  below  the  categories.     CATEGORY:  Effect  of  Natural  Selection  on  Allele  Frequency     1)  Directional  Selection   • Choose  a  trait  that  can  be  affected  by  natural  selection.  Create  2  charts:  the  normal  distribution  of   that  trait  (bell-­‐shaped  curve),  and  the  distribution  of  that  trait  after  directional  selection.   • Define  directional  selection.   • Describe  a  possible  cause  of  the  directional  selection  in  your  example.     2)  Stabilizing  Selection   • Choose  a  trait  that  can  be  affected  by  natural  selection.  Create  2  charts:  the  normal  distribution  of   that  trait  (bell-­‐shaped  curve),  and  the  distribution  of  that  trait  after  stabilizing  selection.   • Define  stabilizing  selection.   • Explain  how  does  stabilizing  selection  affect  the  genetic  diversity  of  a  population     3)  Disruptive  Selection   • Choose  a  trait  that  can  be  affected  by  natural  selection.  Create  2  charts:  the  normal  distribution  of   that  trait  (bell-­‐shaped  curve),  and  the  distribution  of  that  trait  after  disruptive  selection.   • Define  disruptive  selection.   • How  can  disruptive  selection  lead  to  the  formation  of  new  species?     CATEGORY:  Types  of  Isolating  Mechanisms   A)  Behavioral  Isolation   • Demonstrate  an  example  of  behavioral  isolation  using  pictures  and/or  other  media.   • Define  behavioral  isolation.   • Describe  an  example  of  behavioral  isolation  in  humans.     B)  Geographic  Isolation   • Demonstrate  an  example  of  geographic  isolation  using  pictures  and/or  other  media.   • Define  geographic  isolation.   • Describe  how  geographic  isolation  leads  to  the  formation  of  new  species.     C)  Temporal  Isolation   • Demonstrate  an  example  of  temporal  isolation  using  pictures  and/or  other  media.   • Define  behavioral  isolation.   • How  are  speciation  and  reproductive  isolation  related?    

Poster  presentation  rubric     2  charts  clearly  demonstrate  selective  pressure  _____  /  4   2  definitions  (selection,  isolation)  accurate  _____  /  4   2  questions  written  out  and  answered  _____  /  4   All  information  clearly  written,  easy  to  read  (includes  titles)  _____  /  4   Poster  is  aesthetically  pleasing  _____  /  4     Total  _____  /  20