I think so. In a pinch, if I need a male flower, all squash blooms are game. Yesterday, I ran over to my neighbor's pumpkin patch (with his prior permission) to grab a couple o blooms to try to hand pollinate my butternut and yellow squash. Not sure if that worked. But in the past, I have successfully used different squash to pollinate each other when only one produced a male bloom and everything else had female blooms.Can a spaghetti squash pollinate a yellow squash?