AP® Biology

The statistics section of the AP® Biology exam is without a doubt one of the most notoriously difficult sections. Biology students are comfortable with memorizing and understanding content, which is why this topic seems like the most difficult to master. In this article,The Chi Square Test: AP® Biology Crash Course, we will teach you a system for how to perform the Chi Square test every time. We will begin by reviewing some topics that you must know about statistics before you can complete the Chi Square test. Next, we will simplify the equation by defining each of the Chi Square variables. We will then use a simple example as practice to make sure that we have learned every part of the equation. Finally, we will finish with reviewing a more difficult question that you could see on your AP® Biology exam.

By this point in your biology education, you already know that the genetic information of all living things on the planet can be found in a lengthy molecule known as deoxyribonucleic acid, or DNA. The proverbial holy grail of scientists who sought to find it throughout history, DNA is the metaphorical “blueprint” from which living things’ bodies and systems are built and run. But the question remains: how does DNA accomplish this? How do we get from genetic blueprint to living, reproducing organism?