clones beginning to show signs of flowering

I have a tray full of clones but some show signs of flowering, like pre-flower hairs. what does this mean? Can i still use these clones?

Yes these are just preflowers plants will show signs of sex after about two months no matter the light cycle I'm assuming your giving at least 16 hours of light .your plant will not full out bud under this light cycle n u can keep taking clones unless of corse they r an auto strain