MEND ELIAN INHERITANCE 



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of the pair comes from the female parent the other from the 

 male. Mendel crossed two types of sweet pea, one parent plant 

 producing yellow peas, the other green peas. A hybrid (Fi 

 generation) resulted from this cross which produced only yellow 



FIG. 93. Mendelian inheritance resulting from the crossing of yellow and green 

 peas. (From Morgan.) 



peas. These yellow peas produced plants which were then inter- 

 crossed or self-fertilized and the resulting peas (F2 generation) 

 were found to be mixed, the pods containing both yellow and 

 green peas in the proportion of three yellow to one green (Fig. 

 93). These in turn were grown and again self-fertilized when 

 it was found that the green peas produced only green peas, 



