KEY CONCEPT _____ encode _______ that produce a ______ _____ of _____.

The same ____ can have many ________. A gene is a _____ of ____ that directs a cell to make a certain _______. Each ____ has a _____, a _______ ________ on a pair of __________ chromosomes.

An ______ is any __________ ____ of a ____ occurring at a specific _____ on a chromosome. Each ______ donates ___ ______ for every ____. _________ describes ___ _______ that are the ____ at a specific _____. ____________ describes ___ ______ that are _______ at a specific _____.

Genes influence the ___________ of ______. All of an __________ _____ _______ is called the ______. A _______ refers to the makeup of a ______ ___ of _____. (____ ______ ______ designation) A _________ is the ________ __________ of a _____.

_______ can be represented using _______. A _______ ______ is expressed as a _________ when at least ___ ______ is ________. A _________ _____ is expressed as a _______ only when ___ _____ are present. ________ alleles are represented by _________ letters; ________ alleles by ________ letters.

Both __________ _______ and ___________ _______ yield a _______ ________. Most ______ occur in a _____ and do ___ ____ simple _______-_________ patterns.