372 APPENDIX B 



forced to mate his selected individual with one of the ordinary 

 type. If the inheritance happens to be Mendelian a new race 

 of "pure" dominants or "pure" recessives, as the case may be, 

 is established, in which the " opposite number " ordinarily remains 

 permanently latent so long as the breeding is inter-varietal, but 

 is apt to spring into activity under the influence of crossing or 

 other causes which disturb the stability. 



