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| You don’t inherit traits; you inherit... |
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| the study of how traits or characteristics are passed from parents to offspring |
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| the basic unit of inheritance. Genes are composed of DNA and are located on chromosomes. [By interacting with both the internal and external environment, the gene controls the development of a trait.] |
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| one of the two or more contrasting forms of a gene that occupy a particular locus on homologous chromosomes. |
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| the genes an organism possesses for the trait or traits being studied. [ The genetic constitution of an organism, either latent or expressed. The sum total of all the genes present in an organism.” |
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| what the organism looks like [for the traits in question]. The physical appearance of an organism resulting from the interaction between the genotype and the environment. |
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| Homozygous (true-breeding) |
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| the condition that exists when the genes for a given character on homologous chromosomes are alike. |
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| the condition that exists when the genes for a given character on homologous chromosomes are unlike. |
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| term applied to a gene that exerts its full phenotypic effect regardless of its allelic partner. |
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| term describing a gene whose phenotypic expression is masked by a dominant allele. Heterozygotes are phenotypically indistinguishable from dominant homozygotes. |
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