Fig. 155. Effects of removal or transplantation of sex glands in Brown Leghorn fowls. 1 and •?. Normal 

 male and female respectively. 3. Feminized male. At an early age the testes were remove*! anil re- 

 placed by ovaries. 4. Castrated male, three years old. Notice undevelop<Mi comb and wattles, but 

 characteristic male hackle feathers, tail feathers and spurs. 5. Castrated female. Notice well-developed 

 comb and wattles but characteristic female plumage. (After Dr. H. D. Goodale.) 



