If a pair of twins developed when their mother's egg split in half and they were fertilized by different sperm, could one of them develop situs inversus? The child with the condition would be male, the other one, without the condition, would be female. They both look very much alike, like, hard to tell apart alike, and do have mirrored traits, but they aren't identical twins. Is any of this possible?
I should point out that the whole 'egg splitting before it's fertilized' is a theory that some scientists developed, it has not been proven, I believe, but it's known as 'polar body twins' or 'half identical twins'.