Heredity Review

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What is heredity?

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

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What is a gene?

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A gene is a segment of DNA that contains the instructions for building a specific protein, which influences traits.

Front

What is the difference between dominant and recessive alleles?

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Dominant alleles are expressed in the phenotype even if only one copy is present, while recessive alleles are expressed only when two copies are present.

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What does homozygous mean?

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Homozygous refers to having two identical alleles for a particular gene.

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What does heterozygous mean?

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Heterozygous refers to having two different alleles for a particular gene.

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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.

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What is a phenotype?

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A phenotype is the observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

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What is a genotype?

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A genotype is the genetic constitution of an individual, specifically the alleles present for a particular gene.

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What is the role of mutations in evolution?

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Mutations are changes in DNA that can create new traits, which may be beneficial, harmful, or neutral, and contribute to evolution.

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What is selective breeding?

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Selective breeding is the process of breeding plants or animals for specific traits, often used in agriculture and animal husbandry.