Patterns of Heredity Vocab Review

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Mutation

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Any permanent change in a gene or chromosome of a cell; may be beneficial, harmful, or have little effect on an organism.

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Genotype

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An organism's genetic makeup, or allele combinations.

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Dominant

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An allele whose trait always shows up in the organism when the allele is present.

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Phenotype

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An organism's physical appearance, or visible traits.

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Allele

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Alternate form of a gene for a single trait; may be dominant or recessive.

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Heterozygous

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Having two different alleles for a specific gene.

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Recessive

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An allele whose trait is masked in the presence of a dominant allele.

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Gene

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A segment of DNA that contains the instructions for building a specific protein.

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Chromosome

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A structure made of DNA and proteins that contains genetic information.

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Heredity

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The passing of traits from parents to offspring.