34 The Third and Fourth Generation 



were, surprisingly, of the two sorts again, the 

 green and the yellow. Moreover, of the 8,023 

 peas so produced 2,001 were green, which makes 

 the proportion of yellow peas to green peas 

 almost exactly 3 to i. Mendel tried a similar 

 experiment with vines that grew about , six 

 feet tall and dwarfs of only eighteen inches, 

 cross-pollinating their blossoms in the same 

 careful way. When the resulting peas were 

 planted, they produced nothing but tall vines. 

 But from the peas that these tall vines produced 

 in the usual way grew both tall and short vines, 

 and when counted they were discovered to be 

 very nearly in the proportion of three tall vines 

 to every short one. Similar results were 

 obtained with vines that produced smooth peas 

 and those that grew only wrinkled ones, with 

 vines that bore colored blossoms and those that 

 had white ones. A tabulation of Mendel's re- 

 sults with peas differing in these and in other 

 characters is found in Table II. 



Since in all these cases one of the characters 

 in each pair seems to eclipse the other in the 

 first hybrid generation (known as the Fj genera- 



