Mendelian Patterns of Inheritance

Trait: variation of a particular character
inheritance: receiving of traits by heredity
heredity: passing of traits from parents to their offspring
genetics: branch of science that studies heredity

Medel's Theory
Parents pass on units of heredity (factors) to their offspring (today: factor=gene)

Questions involving punnett squares are always difficult to me, but I find the X and Y linked, as well as autosomal, etc linked questions so easy.