ADVERTISEMENT

Fraternal twins arise from two fertilized eggs (zygotes) that develop into nonidentical siblings. These two zygotes can, on rare occasion, overlap and fuse and develop into one body with two distinct sets of DNA. What is this condition called? by

Fraternal twins arise from two fertilized eggs (zygotes) that develop into nonidentical siblings. These two zygotes can, on rare occasion, overlap and fuse and develop into one body with two distinct sets of DNA. What is this condition called?