Hello Rajtaj,
A single strain can contain various phenotypes. For example, Barneys Farm's Sweet Tooth Auto has got at least 2 different phenotypes. One is indica dominant, finishing in around 8 weeks and growing with very strong indica characteristics. The other phenotype takes 10+ weeks and grows very tall like a sativa. It is very frustrating handling such different phenotypes when growing a single strain indoors.
Good luck with your project, I wish you all the best! 👽