How many days flowering before that growth started to show? I was convinced about 10 days into flowering my plant was male. It turned out to be female. I wouldn't kill it till your 100% sure. The female growth kind of looked like little balls to me at first, then they opened up and walla...female. I wouldn't pull it till you see a bunch of little balls in between the nodes. It probably won't pollinate your other plant (unless you're a few weeks in), and it will be worth the wait.