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What risk can be higher in an insert with repeated DNA sequences?

Answer and explanation

Correct answer: Rearrangement by recombination

The governing concept is genetic stability of repetitive DNA in a cloning host. Repeated or highly homologous sequences can align with one another during DNA replication or repair and undergo homologous recombination. Such events may delete a repeat, duplicate a segment, invert a region, or otherwise rearrange the insert, causing loss of the intended construct. A host strain chosen for reduced recombination activity and careful culture conditions can lower this risk, although confirmation by restriction analysis or sequencing may still be needed. Option A is correct; water evaporation, protein taste, and agar melting are not genetic consequences of repeated sequences.

Related tags

Repeated DnaRecombinationGenetic StabilityCompetent HostPrinciples Of BiotechnologyBiotechnologyClass 11 Mcq

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