64^' THEORY OF EVOLUTION 



(fig. 28 to right) only one of which is like the 

 male. Here tlie analysis of the breeding data 

 shows the possibility of explaining this case 



Fig. _'S. Papilio )i()lyti's, with tlirce types iif feTiiale to right 

 and one type of male aliove to left. 



as due to two pairs Mendelian factors which 

 give in combination the tln-ee tyj^es of female. 

 Taking these cases togetlier, they fnrnish 

 a much simpler explanation than the one pro- 

 posed by Darwin. They show also that char- 

 acters like these sliown l)y wild species may 

 follow JMendel's law. 



