26 JOSÉ fernXndez-nonidez 



de WiLsoN donde encontrará una discusión más detenida acerca 

 de este punto. Tan sólo me permitiré copiar la opinión de dicho 

 autor acerca del papel que los cromosomas sexuales juegan en 

 la determinación y herencia del sexo: 



«It is possible to maintain as some writers have done, that 

 the sex-chromosomes are not a determining cause but only an 

 accompaniement of sex. I do not myself consider them as sex- 

 determinants in any exclusive sense. I do regard them as one 

 link — probably an essential one — in a chain of factors by which 

 sex is determined and inherited; and since they are the most ac- 

 cessible and obvious of these factors, we may for purposes of 

 analysis confine our attention to them.» 



