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In _____ _____, only animals with desired characteristics are allowed to produce the next generation.

selective breeding

Crossing dissimilar individuals to bring together the best of both organisms is called _____.


The continued breeding of individuals with similar characteristics is called _____.


Biologists change the DNA code of a living organism through _____ _____.

genetic engineering

A _____ _____ cuts DNA at a specific sequence of nucleotides.

restriction enzyme

DNA fragments can be separated and analyzed by _____ _____.

gel electrophoresis

DNA molecules that are produced by combining DNA from different sources are called _____ _____.

recombinant DNA

A technique known as _____ is used to make many copies of a single gene.


A gene for antibiotic resistance may be used as a _____ _____, making it possible to identify a transformed cell.

genetic marker

A _____ organism contains genes from another species.


A _____ is a member of a population of genetically identical cells produced from a single cell.


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