Recombinant DNA Technology
The transfer of antibiotic-resistant genes from genetically engineered bacteria to disease-causing bacteria __________ .

has occurred
would be of no concern if it occurred.
seems unlikely
can never occur

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Recombinant DNA Technology
Knockout mice are created by

transfecting embryonic stem cells with an altered gene sequence
mutagenizing a mouse and selecting for mutant offspring
creating a chimera by fusing cells from two different cell lines
infecting the mouse with a retrovirus

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Recombinant DNA Technology
Some genetic diseases cannot be diagnosed by changes in restriction sites. Some of these can be detected by allele-specific oligonucleotide probes. These are

short sequences that will hybridize only to a specific base sequence
PCR-amplified variable numbers of tandem repeats (VNTRs)
copies of the gene with an altered sequence so that a restriction site is inserted
mutagenized copies of a gene

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Recombinant DNA Technology
Isoschizomers recognize

different recognition site and different recognition sequence
same recognition site and recognition sequence
same recognition site and different recognition sequence
same recognition sequence but different recognition site

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