No. 574] 



INHERITANCE 



583 



of the acessory organs and of the secondary sexual char- 

 acters of the female, and favorable for the development of 

 the accessory sexual organs and of the secondary sexual 

 organs of the male. This view is of course compatible 

 with the idea that there may be special factors for these 

 organs in chromosomes other than the sex chromosomes, 

 and the view holds both in a general way and on the 

 special chromosome hypothesis as well. 



To assume that all the factors for characters that are 

 shown by the male or by the female must be carried by a 

 sex chromosome of some kind, if carried at all by chromo- 

 somes, is a travesty of the point of view of those who hold 

 to the chromosome hypothesis as a reasonable working 

 hypothesis to account for Mendelian inheritance. Just 

 as it has been shown that there are factors in the sex 

 chromosomes that affect many parts of the body, that are 

 not concerned with differences of sex; so, on the other 

 hand, the evidence shows that there are factors in other 

 chromosomes that are influential in producing secondary 

 sexual characters. 



