THE FUNDAMENTALS OF MENDELISM 5I 



chromosomesj a hypothesis which is the basis on which the whole 

 subsequent developments of genetics are founded. By determining the 

 Hnkage values of a set of linked genes we can determine their dis- 

 tance apart (measured in units of length in which the chance of a break 

 is equal) and thus their order. Linkage maps can be prepared in this 

 way and will be discussed in Chap. 4. 



