Genetics Review

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What is genetics?

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Genetics is the study of heredity and the variation of inherited characteristics.

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What is a trait?

Back

A trait is a specific characteristic of an organism, such as eye color or height.

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What is an allele?

Back

An allele is a variant form of a gene that can produce different traits.

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What does dominant mean in genetics?

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A dominant trait is one that is expressed in the phenotype even when only one copy of the allele is present.

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What does recessive mean in genetics?

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A recessive trait is only expressed in the phenotype when two copies of the allele are present.

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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, represented by the alleles inherited from parents.

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What is a Punnett square?

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A Punnett square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles.

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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.