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Chapter 4 Genetics: The Science of Herdity

A pattern of inheritance in which both alleles for a gene are expressed equally
The passing of physical characteristics to offspring
One whose trait always shows up in the organism
A gene that has three or more possible alleles that determine the trait
An organism's physical appearance or visible traits
An organism's genetic make-up or alleles
The different form of a gene
More than one gene affects a trait in this process
The number that describes how likely it is that an event will occur
An organism that is the offspring of many generations that have the same form of a trait
Process in which a new organism begins to form when egg and sperm cells join
An organism that has two different alleles for a trait
Pattern of inheritance in which one allele is only partially dominant
A word used to describe the factors that control a trait
Process by which the number of chromosomes is reduced by half as the sex cells form
One that is hidden whenever the dominant allele is present
A chart that shows all the possible ways alleles can combine in a genetic cross
An organism that has two different alleles for a trait
The scientific study of heredity
A specific characteristic such as stem height or seed color