Hey guys, I'm not sure if anyone can give me an answer on this forum (but since I'm not a member of any other, I might as well try.)

How much weight do grades from your first few years of high school hold on an application to a university that requests them? This school year I have achieved really highly compared to previous years, due to the fact that I found some 'direction' and got motivated to strive toward becoming a scientist (of some kind).

In previous years I've scored maybe a C+ average. Right now I'm getting high As, and getting better grades every day. Can any of you speak from experience or actual knowledge (please don't guess) as to how much my old scores will hinder my ability to get into my university of choice?

Thank you so much if you can help