bicoid

Hey, everyone. I'm finishing my sophomore year of undergrad at a huge public university. For the last two years, I've been interested in medical school, but after doing some soul-searching, I'm sure graduate school is a better fit for me. As of now, I have a 4.0 GPA and have done no prep/practice for the GRE, so I can't report on how I'd do there. I've been in a lab since fall of my freshman year and love my PI. She's very supportive, and I will be doing an REU in her lab this summer before junior year. Based on my coursework and personal interests, I would like to research cancer biology or developmental biology. My current school has one developmental biology professor with about 2 undergrads, and no one is researching cancer. Thus, my current research is in a lab with interesting projects, but most of the projects are in ecology -- and thus is hardly relevant to what I'd like to do in grad school. Because I've been involved in this lab so much, my PI is supportive, and I've done a few poster presentations in this lab so far, should I stay here and do an REU after junior year in development/cancer, or should I try to jump ship to the developmental lab? Does this matter much if I'm interested in top-tier programs in cancer/development, or are they just interested in my overall exposure to research, ability to talk about my projects, letters, etc?