DNA & Heredity VOCABULARY

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What is a codon?

Back

A sequence of three nucleotides that form a unit of genetic code.

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What is transcription?

Back

The process in which DNA is copied to RNA.

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What is an allele?

Back

One of a pair of genes that determines a specific trait.

Front

What is a recessive allele?

Back

In a pair of alleles, the one that is masked if a dominant allele is present.

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What is a phenotype?

Back

The physical appearance of a trait.

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What is a gene?

Back

A segment of DNA that contains the instructions for building a specific protein.

Front

What is a dominant allele?

Back

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

Front

What is a genotype?

Back

The genetic makeup of an organism, representing the alleles it carries.

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What is a chromosome?

Back

A structure made of DNA and proteins that contains genetic information.

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What is replication?

Back

The process of copying DNA to produce two identical DNA molecules.