In 



UNIT-CHARACTERS OF CATS 143 



yellow and black and then chiefly in the female sex. Lon^ 

 (angora) hair is a recessive variation from normal coat in cats 

 as in rabbits and guinea-pigs. A short stumpy tail, seen in 

 the ''Manx" cat, represents an imperfectly dominant unit- 

 character variation. Homozygous dominants are tailless; 

 heterozygotes are short-tailed; normal (long) tail is recessive. 

 Polydactylism (the possession of extra toes) is an imperfectly 

 dominant variation. 



