Mutation and Adaptive Traits

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Gene Noun

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[jeen]

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Gene

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A specific sequence of DNA on a chromosome that codes for a protein, determining an organism's inherited traits.

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Example: The image shows a gene as a specific part of DNA on a chromosome inside a cell, explaining inherited traits.

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Protein Molecule Noun

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[proh-teen mol-uh-kyool]

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Protein Molecule

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A large, complex molecule made of amino acids, whose structure and function are determined by a specific gene.

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Example: The image shows how amino acids link to form peptides, which then fold into a protein molecule.

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Trait Noun

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[trayt]

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Trait

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A specific, observable characteristic of an organism, such as its appearance or behavior, which is determined by genes.

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Example: Different eye colors show how traits are observable characteristics determined by genes.

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Mutation Noun

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[myoo-tay-shun]

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Mutation

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A random and permanent alteration in the DNA sequence of a gene, which can lead to a new trait.

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Example: A DNA strand with a highlighted mutation shows a change in the sequence, explaining mutation.

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Variation Noun

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[vair-ee-ay-shun]

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Variation

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The range of differences in genetic traits that exist among individuals within a specific population or species.

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Example: Different ladybugs show variation in size and spot patterns, illustrating genetic diversity.

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Population Noun

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[pop-yuh-lay-shun]

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Population

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A group of individuals of the same species that live and interbreed within a particular geographic area.

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Example: Different finch beaks show how populations adapt to available food sources, illustrating adaptive traits.

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Generation Noun

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[jen-uh-ray-shun]

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Generation

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A single stage in a line of descent, representing the time from the birth of parents to their offspring.

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Example: A family tree diagram showing one generation, indicating parents and their offspring.

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Environment Noun

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[en-vahy-ruhn-muhnt]

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Environment

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The complete range of external conditions, including biotic and abiotic factors, in which an organism lives.

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Example: A pond ecosystem showing fish, plants, and water illustrates the environment where organisms live.

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Natural Selection Noun

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[nach-er-uhl suh-lek-shun]

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Natural Selection

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The process where organisms with advantageous traits are more likely to survive, reproduce, and pass those traits on.

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Example: Different finch beaks show how natural selection favors traits that help survival and reproduction.

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Adaptive Trait Noun

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[uh-dap-tiv trayt]

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Adaptive Trait

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An inherited characteristic that enhances an organism's ability to survive and reproduce in its particular environment.

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Example: Different bird beaks adapted for specific diets show how adaptive traits help survival.