Unfortunately, I don't think so. If you look at this example 1x to 1x connector:
the connector that goes into the motherboard slot will be fine, but on the card side it's not going to fit. There is one break/space in the pins (for lack of a better word) on the card, but that connector would need that space and then an additional space where the connector ends
One this 2nd pic, on the connector that goes on the card, you can see one break in the pins, but not a 2nd. Hopefully this makes sense.