Which of the following was NOT a consequence of the California Gold Rush? A. The rise of big cities in California like San Francisco and Los Angeles
B. Migration of people from different parts of the world to California.
C. Conflict between gold minors and California farmers

C. Conflict between gold miners and California farmers

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.