To provide a governing framework if im correct but please add a little more information
        
             
        
        
        
 It's kinda hard to explain but I found a reliable website 
http://www.history.com/topics/mcculloch-v-maryland
        
             
        
        
        
Answer:
yooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo 
welcome
 
        
             
        
        
        
Self pollination happens when the pollen is deposited on the same flower or another flower on the same plant, while cross pollination is the transfer of pollen from another plant on a different flower
        
                    
             
        
        
        
I would say it would either be racism or discrimination.
Hope it helps.