QUESTIONS AND REFERENCES 393 



3. What is artificial selection? Of what value is it? 



4. What are hybrids and how are they formed ? 



5. What are Mendel's Laws? Can you explain how segregation takes 

 place? 



6. Give some examples of results of hybridization in plants and animals. 

 Use the Journal of Heredity if possible for reference. 



Problem and Project References 



Hunter, Laboratory Problems in Civic Biology. American Book Company. 

 Alwood, A Civic and Economic Biology. P. Blakiston's Son and Company. 

 Babcock and Clausen, Genetics in Relation to Agriculture. McGraw-Hill Book 



Company. 

 Downing, The Third and Fourth Generation. University of Chicago Press. 

 Doncaster, The Determination of Sex. Cambridge University Press. 

 Guyer, Being Well Born. The Bobbs-Merrill Company. 

 Gruenburg, Biology and Human Life. Ginn and Company. 

 Jewett, The Next Generation. Ginn and Company. 

 Osterhout, Experiments with Plants. The MacmUlan Company. 

 Harwood, New Creations in Plant Life. The Macmillan Company. 

 Walter, Genetics. The Macmillan Company. 

 Punnett, Mendelism. The Macmillan Company. 

 Farmers' Bulletins: 195, 461, 576, 619, 887, 952, 1040, 1167, 1192, 1209, 1263, 



1332, 1369. 

 Journal of Heredity, Numerous Articles. American Genetic Association, 



Washington. 



