As a "mirror" twins

Monozygotic (monozygotic) twins are formed identical from one zygote (one egg, fertilized by one sperm), is divided into two stages of crushing (or more) parts. They have identical genotypes. Monozygotic identical twins are always the same sex and have a very large portrait likeness.

Among monozygotic twins often noted the great similarity of character, habits, and even biographies. About 25% of identical twins mirror. This can be expressed externally (one mole on his left cheek, the other - on the right), or even in the arrangement of the internal organs (like the heart of one of the twins could be on the right), it is often one of the twins left-handed, the other - pravsha. < br />








Source: mirfactov.com/