Pedigree. Here is a pedigree depicting X-linked recessive inheritance. These traits are often passed from a carrier mother to an affected son. X-linked traits are never passed from father to son.
Swing state definition, a state of the U.S. in which the Democratic and Republican candidates both have a good chance of winning and that is considered key to the outcome of a presidential election: the swing states of Ohio and Indiana. See more.
You may also hear a purple state called a swing state, because the vote can swing either way, or as a battleground state, in a reference to the fact that candidates sink serious resources into purple states, often long before the election.