There's definitely room in anthropology for model-building and projection/fieldwork comparisons, especially in the more biologically inclined flavours of anthropology.
I think if you find yourself truly fascinated by the field and think that it is worthwhile to pursue, it's definitely worthwhile for you to go for it and apply. You'll be required to justify your interest (as does everyone) so taking the available Anth classes, and any other way you could bulk up your knowledge of the field, would be important. Also, it's always good to think about which department you'll apply to in terms of research interest, but in this case, you might also want to consider the department's stance on accepting people without previous formal training in anthropology. Some departments are very keen on taking people from a wide variety of backgrounds, so long as they show a commitment to the subject and and a genuine curiosity. But I've also encountered some departments that are very strict in their intake, and generally don't take people who haven't completed a bachelors or masters in anthropology already. If you intend to apply, you'll be doing some research anyway, so this is just another thing to think about.
It'll probably be less straightforward for you to get in to a program, but by no means impossible - I know several people who ended up in anthropology programs after training in Computer Science, Statistics, and other similar subjects.