Certainly not this year. If you save the seeds from cross pollinated squash, who knows what you'd get next year though. Not sure if those two are close enough related to cross with each other.

Just don't save seeds,and you will be fine. They cross pollinate but it only shows up in the offspring.

Thanks for replies. What I mean is I want to plant them in the same pot. When they flower, will they pollinate each other and give me pattycrook neck squashes, or will each plant bear its own fruit. I have the pot ready and the seeds, but I just have one container. I am not an experts on veggies, so I need to know.
Thanks for any advice.

I read the advice, but don't understand the responses.

The answer is no. You will get patty pan and you will get crookneck, each on it's own plant.

If you desire to save the seeds for next year, then you may get little mutant plants, but this year's produce will be fine.

BTW, I hope you have a really BIG container! You do know how big these plants get, right?

Yes, I have an 18gall container, with 5 drainage holes in the bottom, and I have MG organic p/mix and espoma org. fert for when the going gets tough! Am I to assume that they are going to get that big?!! I planned on putting two seeds at the base of each stake. I have two stakes.