88 A MANUAL OF MENDELISM 



SiEEs Progeny 



(v) The last test for which there are available data is 

 that greys containing chestnut recessive should produce 

 equal numbers of greys and chestnuts when mated with 



chestnuts, for the constitutions are p, and p, . 



The following table gives the progeny of twenty grey 

 sires containing chestnut when mated with chestnut 

 mares. As chestnut Thoroughbreds were less common in 

 the eighteenth century and chestnut matings therefore 

 comparatively few, the progeny of the seven eighteenth- 

 century grey sires named above are lumped with 

 those of eight other similar sires, while the progeny of 

 the five nineteenth-century sires are given separately : 



Sires 



Progeny 



Grey 

 Fifteen eighteenth-century sires 23 

 Strathconan 24 



Pepper and Salt 17 



Grey Leg 13 



Grey Friars 15 



Sir John Falstaff 2 



Bay Black Chestnut 

 (8) 1 

 (8) - 



(1) - 

 (3) - 



17 



16 



7 



15 



4 



2 



