What's the Name of That Book??? discussion

Sci-fi anthology I read in Nigeria about 15 years ago...(paperback, I remember a yellow or cream cover...about 200 to 300 pages, I think...)

The only story I distinctly remember: Some scientists said they must find God. They did all the research and found out that the only way to invoke God was to get a couple (male and female) to have sex and connected all the electrodes and stuff, added all the right chemicals, added some other processes which I've forgotten.

Anyways, it worked. God appeared...and looked very surprised to find that the universe existed. Apparently he had sneezed or something and had created the universe without even knowing. I seem to remember he was rather indifferent to the humans...

One of the things they further expounded on in the story is how our actions have unintended consequences we may never even get to know about ever.

Thanks ya'll.

bump

Pretty sure I know what this is, I just have to figure out where I read it.

If I'm remembering the same story, they realized that (identical?) twins for some reason had the highest rate of success, but the twins had a hard time overcoming the incest thing and/or the homosexual sex thing (because all the test subjects were heterosexual, I guess?), and then they somehow found, like, an opposite-gender long-lost clone/twin that they matched up with one of the people doing the experiment, who was the sister of the narrator of the story?

OK, I think it's the novella Trinity, from Trinity and Other Stories by Nancy Kress, although I think I originally read it in Great Tales of Madness and the Macabre. It's been collected/republished in a few places, so if you're trying to track down a copy, you could also check out The Best of the Best: 20 Years of the Year's Best Science Fiction, which is avaible as an ebook.