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likelihood that a particular event will occur

Punnett square

diagram showing the gene combinations that might result from a genetic cross


term used to refer to an organism that has two identical alleles for a particular trait


term used to refer to an organism that has two different alleles for the same trait


physical characteristics of an organism


genetic makeup of an organism

independent assortment

independent segregation of genes during formation of gametes

incomplete dominance

situation in which one allele is not completely dominant over another


situations in which both alleles of a gene contribute to the phenotype of the organism

multiple alleles

three or ore alleles of the same gene

polygenic traits

trait controlled by two or more genes

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