Twins
Twins are siblings carried together in the womb and born at the same time. Similarities and differences between twins can be used to answer questions about the role genes and the environment pla...
Read more
Twins
There are two distinct types of twins in humans: identical and fraternal. Identical twins, also called monozygotic twins, result from the splitting of a single zygote into two distinct embryos. ...
Read more
Twins
Two children born at the same birth.
Identical, or onozygotic, twins are of the same sex and are genetically and physically similar because they both come from one ovum, which, after fertilizati...
Read more