You are presented with the question "Genes that are located on the same chromosome are chained together by the what?" and the following answer choices: 
- forces
 - light energy
 - voltage
 - thousands
 - A computer
 - sun's heat
 - photons
 - Acids

Now knowing that genes that are located on the same chromosome are called linked genes and thousands of genes are linked together in a chain to form chromosomes, choose the best answer.


 

    thousands     