Question

Which of the following are characteristics of identical twins?

• A. Both are of the same gender.
• B. One is a girl and the other is a boy.
• C. Both have the same blood type.
• D. (a) and (c) above.

Answer 1

The correct option is D (a) and (c) above.

Identical twins share 100% of their genes. Twin brothers and twin sisters are identical twins while a twin sister and brother are non-identical twins (or fraternal twins).
While they are born at the same time, twins inherit different traits and may not even look similar, this is mostly in case of non-identical twins.
Identical twins possess identical genes, eye and hair colour, and they are always the same sex and have the same blood type as well.