POLYGAMOUS FACTORS 85 



Sires Dams 



Gr Gr 



Dn Dn 



Gr Gr 



By By 



Gr Gr 



Bl Bl 



Gr Gr 



Ch Ch 



the chances are equal 



{a) that the grey factor in the sire combines with 

 the grey factor in the dam, 



(b) that the grey factor in the sire combines with 



whichever recessive the dam may carry, 



(c) that the recessive which the sire may carry 



combines with the grey factor in the dam, and 



(d) that the recessive in the sire combines with 



the recessive in the dam. 



Consequently there should be three grey foals to one 

 of all the other colours together. 



Greys Other 

 colours 

 69 grey with grey matings among early 



Thoroughbreds produced . . 53 16 



(iii) Hybrid greys with other colours should leave 

 grey foals and foals of all other colours and the greys 

 should be to all the others together in the ])rop()rti()n 

 1:1; for the parental constitutions should be 



