354 PLANT AND ANIMAL BREEDING 



sess the desired 'characters, and are mated, their offspring will 

 usually be a pure type. 



QUESTIONS AND SUGGESTIONS 



1. What bearing has plant and animal breeding on the food situa- 

 tion of the world ? 



2. Why is scientific plant and animal breeding a comparatively 

 recent development ? 



3. State five aims of plant and animal breeders. 



4. Describe in detail an example of each aim mentioned in 

 question 3. 



5. Describe in detail how a particular trait may be established. 



6. What two biological principles are involved in breeding experi- 

 ments ? 



7. State three difficulties animal breeders encounter that are not 

 encountered by plant breeders. 



8. Look up and report on the life and work of Luther Burbank. 



SUPPLEMENTARY READINGS 



Osterhout, W. S. V., Experiments with Plants (The Macmillan Co.). 

 Sinnott & Dunn, Principles of Genetics (McGraw-Hill Book Co.). 



