|A ____ is a unit of heredity in a living organism.
|Gregor Mendel (1822-1884) studied trait ____ in pea plants.
|Biological information flows from ____ to RNA to protein.
|The amino acid sequences of proteins are specified by ____.
|Mutations create variations in a population's gene ____.
|Women have two X ____, whereas men have an X and Y.
|A ____ genotype has two different alleles.
|The three alleles for human ____ are named A, B, and O.