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Okay, if all possible non-reciprocal crosses were made among a group of shrunken mutants in maize, giving rise to 10 hybrids.  For each of the possible outcomes below, list the number of complementation groups (units of function) defined by the mutants in this collection.  The number of mutant hybrids is listed; you list the number of complementation groups.  

# mutant hybrids          # complementation groups

0 

1                                                                   

2                                  

3                                  

4                           

6

9

10             

..... (x.x)~~~/..