Inheritance

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What is inheritance?

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Inheritance is the process by which genetic information is passed from parents to offspring.

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What is a dominant allele?

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

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What is a recessive allele?

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A recessive allele is a version of a gene that is only expressed in the phenotype when two copies are present.

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What does heterozygous mean?

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Heterozygous means having two different alleles for a particular gene, one dominant and one recessive.

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What does homozygous mean?

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Homozygous means having two identical alleles for a particular gene, either both dominant or both recessive.

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What is a genotype?

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A genotype is the genetic makeup of an organism, represented by the alleles it possesses.

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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 its genotype.

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What is complete dominance?

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Complete dominance occurs when the phenotype of the heterozygote is the same as that of the homozygous dominant.

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What is incomplete dominance?

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Incomplete dominance is when the phenotype of the heterozygote is intermediate between the phenotypes of the two homozygotes.

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What is codominance?

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Codominance occurs when both alleles in a heterozygote are fully expressed, resulting in a phenotype that shows both traits.