40054
In a series of experiments beginning in the mid-1880 s , Theodor Boveri gave the definitive demonstration that chromosomes are the vectors of heredity ; his two principles or postulates were the " continuity " of chromosomes and the " individuality " of chromosomes .
 Theodor Boveri
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: location, person, organization 
Text: {0} 
Answer:
 Theodor Boveri