no, that's the start of a new branch I don't see any preflowers. How old is the plant? It won't show until it is at least 3 weeks old, and above the 4'th node
Like other have said, that's just new growth, i have a sticky on this with a few pre flowering pics. that might help you. http://forum.grasscity.com/absolute-beginners/873879-how-tell-whether-your-plants-male-female.html