That’s a great question! I love it because it’s one of those questions that can persist even after you sit through lecture, or do whatever reading you’re supposed to do for class. For whatever reason, it’s something you’re just expected to know, even though it’s not really explained outright. It’s great to identify and put those questions into words, so you can get an answer and clear things up now (rather than carrying that hole in your knowledge for years and years).
Germline vs. somatic mutations
Source: Pathology Student
Image credits: Natmandu
Art and Science of Laboratory Medicine