134 



EVOLUTION 



interpretation or rationale of the facts. 

 made the {supposition jfchat thp 

 Of gamers prorhir^rl Ky r the 



He 



CE^\ ar$ of two kinds, each kind bearing only 

 one of the t.grn .^nntmstfid. or alternative 

 which, as we have seen, <^ npt., 

 He supposed also that the two kinds 



hers. Now if each of the hybrids of the F l 

 generation produces in both sexes 50 per 

 cent, of its germ-cells bearing the dominant 

 character and 50 per cent, bearing the re- 

 cessive character, then, if fertilization be 

 fortuitous, 25 per cent, of the fertilized egg- 

 cells will bear only the dominant character, 

 50 per cent, will bear both the dominant and 

 the recessive character (only the former being 

 expressed or well expressed in development), 

 and 25 per cent, will bear only the recessive 

 character. This is called the theory nf fbft 

 ^SfltfiffiP-tiiQflii 0^- P^Ffi ffffl m 5tes. and it is the 

 corner-stone of Mendelism. A scheme will 

 make it clearer: 



Male Cells. 



Female Cells. 



pure dominant 



2 impure dominants 



*" IRJ fKRl i p ure recessive 



