It’s just the right time to start discovering population genetics and understanding basic concepts of the Hardy-Weinberg law.
Population genetics helps us to describe how the frequency of the alleles change over time. To study frequency changes, we analyze the entire population, not just individual organisms.
You can learn more about population genetics here: http://www.ndsu.edu/pubweb/~mcclean/plsc431/popgen/popgen3.htm.
Some good notes are here: http://faculty.buffalostate.edu/wadswogj/courses/303/303%20lectures/Hardy%20Weinberg.pdf
Also take a look at THIS website for some good examples.
Image source: https://www.freepik.com/vectors/habitat Habitat vector created by macrovector