Basic Genetics Vocab

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Heterozygous

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Term that means 'different genes'.

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Phenotype of offspring from crossing TT and Tt

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100% tall.

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bb

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This represents a homozygous genotype.

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Definition of Homozygous

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A genotype with two of the same alleles for a trait.

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BB

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This represents a homozygous genotype.

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Allele

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A variant form of a gene.

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Gene

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A segment of DNA that determines a specific trait.

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Dominant allele

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An allele that expresses its trait even in the presence of a recessive allele.

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Recessive allele

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An allele that expresses its trait only when two copies are present.

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Genotype

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The genetic makeup of an organism.