Beginner Gardening: Why is my zucchini fruit turning yellow?, 3 by Papabukk

Papabukk wrote:
Hi I'm new here at DG's. I'm also new to gardening. I've got some great looking zucchini plants and have harvested a half dozen or so. Recently my fruits are growing normal so I assume they've been pollinated there are bees in the flowers daily. Any way they get yellow at tip of fruit and slowly turn entire fruit yellow and ugly. There are several new fruits growing. They are still small two three four inches still with flower attached. Really would like these not to yellow. The yellowed fruit also appear to be kinda rotten when I finally pull them.
Thanks in advance for any helpful info and/or tips.
Papabukk
Ps. This fruit is bout 6 inches long. Three days ago it had about 3/4 inch yellow tip. Now it's half the fruit.
Thanks again.