MENDELISM IN DOMESTIC ANIMALS 477 
The great variety of diverse characters in fowls, particularly in color 
and pattern of plumage, has made them unusually excellent subjects 
for Mendelian investigations. Although extensive observations have 
been made upon a large number of hybrids, however, the exact factor 
relations are not well understood for many characters. In the list in 
Table LXII some data are presented with respect to dominance of certain 
contrasted characters; but these contrasts should not be taken to in- 
Taste LXII.—Resuurs or Certain Conrrasts IN THE Domestic Fown 
Dominant 
Recessive 
Iixpression 
Barred plumage pattern. . 
Beard tay cnc rcels oes: 
Brown striped down...... 
Cresti(Silky.)e acces essen 
Dark shank color......... 
EGXtra tOGSis.,ccie.e 2 sues coe 
Feathered shanks......... 
Frizzle feathering......... 
High fecundity........... 
High fecundity........... 
Joining of toes........... 
Leaf comb (Houdan) 
Leghorn pattern.......... 
Long tail (Japanese) 
Normal head............ 
Pea comb............... 
Plain feathering.......... 
Plaimbheeliog eerie cece 
Rapid feathering......... 
Red ear lobe............. 
Rose:coMbi no. hehe gs ae 
Rose comb.............. 
Rumplessness...... 
Self-color (Minorca) 
Silky pigmentation....... 
Single comb............. 
Walnut comb........... 
White (Leghorn) 
Yellow shank color....... 
Yellow skin color......... 
Uniform coloration 
No beard 
Red, buff 
Brown, red, pearl iris 
White (Minorca) 
White (Minorca) 
No booting 
Non-broodiness 
Pale brown down 
No crest 
Light shank color 
Normal foot 
Clean shanks 
Normal repent feathering 
Low fecundity 
Low fecundity 
Normal foot 
Single comb 
White (Minorca) 
Normal tail 
Cerebral hernia (Polish) 
Single comb 
Silky feathering 
Vulture hock (Silky) 
Slow feathering 
White (Minorca) 
White ear lobe 
Leaf comb 
Single comb 
Normal uropygium 
Hackle lacing (Brahma) 
Normal mesoderm color 
Comblessness (Breda) 
.| Pea, rose comb 
Colored plumage 
Light shank color 
White skin color 
Sex-linked. 
Almost completely dominant. 
Almost completely dominant. 
Completely dominant. * 
Almost completely dominant. 
Almost completely dominant. 
Imperfectly dominant. 
Almost completely dominant. 
Completely dominant. 
Imperfectly dominant. 
Completely dominant. 
Imperfectly dominant. 
Imperfectly dominant. 
Completely dominant. 
Sex-linked. 
Non-sex-linked. 
Imperfectly dominant. 
Imperfectly dominant. 
Sex-linked.* 
Imperfectly dominant. 
Imperfectly dominant. 
Completely dominant. * 
Completely dominant. 
Imperfectly dominant. 
Almost completely dominant. 
Almost completely dominant. 
Imperfectly dominant. 
Imperfectly dominant. 
Completely dominant. 
Imperfectly dominant. 
Imperfectly dominant. 
Imperfectly dominant. 
Completely dominant. 
Completely dominant. 
Almost completely dominant. 
Completely dominant. * 
Completely dominant. * 
* Disputed by Punnett. 
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