Introduction to Genetics Vocabulary

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Dominant

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The trait that always shows up when present.

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Trait

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A specific characteristic that varies in individuals.

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Phenotype

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The physical appearance of an organism.

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Gene

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A sequence of DNA that codes for a trait.

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Genotype

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The genetic makeup of an organism.

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Recessive

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A trait that only shows up when two copies are present.

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Alleles

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Different forms of a gene that can exist at a specific locus.

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Homozygous

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Having two identical alleles for a particular gene.

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Heterozygous

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Having two different alleles for a particular gene.

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Chromosome

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A structure made of DNA and protein that contains genes.