DIAGRAMS ILLUSTRATING INHERITANCE IN GUINEA PIGS 

 Of one, two and three pairs of characters respectively. B=black, 

 b = white, R = rough coat, r = smooth coat, S = short hair, and s = 

 long hair. The second generation results are, respectively, 3 black, 1 

 white; 9 black -rough, 3 black-smooth, 3 white-rough, 1 white-smooth; 

 and 27 black-rough-short, 9 black-rough-long, 9 black-smooth-short, 9 

 white-rough-short, 3 black-smooth-long, 3 white-smooth-short, 3 white- 

 rough-long, and 1 white-smooth-long, which result from the summation 

 of the combinations in the above diagrams. 



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