Heredity and Genetics

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What is a dominant trait?

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A dominant trait is a genetic trait that masks the presence of another trait. It is the trait that is expressed when at least one dominant allele is present.

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What is a recessive trait?

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A recessive trait is a genetic trait that only exhibits when the dominant allele is not present. It requires two recessive alleles to be expressed.

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What is an allele?

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An allele is a variant form of a gene that determines a specific trait. Different alleles can result in different expressions of that trait.

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NGSS.HS-LS3-2

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What is a trait?

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A trait is a characteristic or feature of an organism that is expressed by genes and can be influenced by the environment.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

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What is a gene?

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A gene is a segment of DNA located on a chromosome that determines the inheritance of a particular trait.

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NGSS.HS-LS3-1

NGSS.HS-LS3-2

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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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NGSS.HS-LS3-1

NGSS.HS-LS3-2

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What is a genotype?

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A genotype is the genetic makeup of an organism, representing the alleles inherited from both parents.

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NGSS.HS-LS3-2

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What is a phenotype?

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A phenotype is the observable physical or behavioral characteristics of an organism, resulting from the interaction of its genotype with the environment.

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What is a homozygous genotype?

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A homozygous genotype has two identical alleles for a particular gene, either dominant or recessive.

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NGSS.HS-LS1-1

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What is a heterozygous genotype?

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A heterozygous genotype has two different alleles for a particular gene, one dominant and one recessive.