result of a cross between two true-breeding parents that express different traits for two characteristics

chemical compound formed when two molecules join together

(of receptor proteins) interaction of two receptor proteins to form a functional complex called a dimer 

describes a species in which the male and female reproductive organs are carried on separate specimens

protease that breaks down peptides to single amino acids; secreted by the brush border of small intestine

refers to the possession of two sets of teeth in a lifetime

animal that develops from two germ layers

diploid stage is the dominant stage

selection that favors phenotypes at one end of the spectrum of existing variation

two sugar monomers that are linked together by a glycosidic bond.

inheritance pattern in which traits are distinct and are transmitted independently of one another

section of a scientific paper in which the author interprets experimental results, describes how variables may be related, and attempts to explain the phenomenon in question

allopatric speciation that occurs when a few members of a species move to a new geographical area

release of an ion from a molecule such that the original molecule now consists of an ion and the charged remains of the original, such as when water dissociates into H+ and OH

part of the renal tubule that is the most distant from the glomerulus