Heredity Unit Post-Assessment Review

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What is heredity?

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Heredity is the passing of traits from parents to offspring through genes.

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What are genes?

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Genes are segments of DNA that determine specific traits in an organism.

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What are alleles?

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Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

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What is a mutation?

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A mutation is a change in the DNA sequence of a gene that can lead to changes in traits.

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What is a beneficial mutation?

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A beneficial mutation is a genetic change that enhances an organism's ability to survive and reproduce.

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How can the environment affect traits?

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The environment can influence traits such as height, which can be affected by nutrition and health.

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What is the difference between dominant and recessive alleles?

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Dominant alleles express their traits even when only one copy is present, while recessive alleles require two copies to express their traits.

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What is phenotype?

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Phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic and environmental factors.

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What is genotype?

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Genotype is the genetic makeup of an organism, representing the alleles inherited from its parents.

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What is natural selection?

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Natural selection is the process by which organisms better adapted to their environment tend to survive and produce more offspring.