An independent variable is something a Scientist messes with like baking soda and vinegar the independent variable is the baking soda and vinegar and the dependant variable is the explosion
The independent variable is what you change in the experiment the dependent variable is what is being changed because of the independent variable or what is being measured
Most of the options are pretty superficial but chromosomal analysis goes in depth therefore you'll get more results and find what could potentially be wrong.
