Special Relationship Between Twins
Different Types of Twins
Identical twins: two offspring that have the same genetic material, have the same genotype, are the same sex, and usually resemble each other closely.
Fraternal twins: one of a pair of twins, not necessarily resembling each other, or of the same sex, that have different genetic material.
Identical twins have almost identical brain wave patterns. They also can share very similar physical characteristics. Mirror twins are identical twins with mirror characteristics.
Some psychoanalysts believe that, because of the shared course of their lives, one twin sees the other as an extension of herself. Consciously or not, most twins have somewhat of a communal identity—one can’t imagine existing without the other because that’s all she has ever known.
Opposite sex twins...
Identical Twins will almost always be of the same sex. There have been 3 - 5 documented cases of opposite sex identical twins.
Even though the twins may be opposite sexes, they still feel the connection that identical twins do. They don't like being apart, they feel the same pain, they are competitive etc.
Connection to God of Small Things
Roy, Arundhati. The God of Small Things. New York: Harper Perennial, 1997.