Mendelian Traits Lab

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Name:   _ ___________________________________  
Period:   _ ______    
 
Date:   _ ___________________________  
Name:   _ ___________________________________  
 
Mendelian   T raits   L ab   -­‐   O bserving   H uman   T raits  
 
 
 
 
 
______   /   3 0  
 
Purpose:     H ow   m uch   d o   t raits   v ary   i n   y our   c lassroom?    
 
Background:   T raits   a re   p hysical   c haracteristics   y ou   i nherit   f rom   y our   p arents.   I n   t his   i nvestigation,   y ou  
will   t ake   a n   i nventory   o f   y our   o bservable   t raits   a nd   c ompare   t hese   t o   t he   o bservable   t raits   o f   y our  
classmates.   Y ou   w ill   t hen   t ake   i nventory   o f   s tudents   a nd   t eachers   i n   y our   s chool.   F inally,   y ou   w ill  
determine   t he   f requency   o f   e ach   t rait   i n   y our   s chool’s   p opulation.    
 
Procedures:    
Observing   y our   o wn   t raits    
• The   g raphic   b elow   s hows   s even   d ifferent   h uman   t raits.     E ach   t rait   h as   t wo   d ifferent   f orms.     S tudy  
the   c hart   b elow,   t hen   f ollow   t he   p rocedures   c arefully.    
 
 
 
1.   W orking   w ith   a   p artner,   o bserve   w hich   f orm   y ou   h ave   f or   t rait   A   t hrough   F .     C ircle   y our   f orm   o f   e ach  
trait   i n   T able   1 .   N OTE:   F or   f inger   h air,   e ven   i f   y ou   h ave   o nly   o ne   h air   o n   a ny   o f   y our   m id-­‐digits,   y ou   h ave  
finger   h air.    
 
 

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