Yes, we have grown zucchini before, but I prefer the flavor of plain old yellow squash. We planted seed that I saved from a hybrid squash shaped like a lemon. I noticed that one plant has saucer type fruit that was apparently from an outcross last year. As a plant breeder, I thought that I could select for a new type of squash that was not hybrid because with hybrids you have to buy new seed each year.I believe you call it zucchini in the US, Mustafa (as indeed we do in Germany).
And yes, it is related to squashes, marrows and pumpkins.
You can tell by the flower and the leaves, can't you?