True or false: Pronuclear injection provides the scientist with a more specific tool than gene-targeted mutation for placement of the transgene.

True or false: Pronuclear injection provides the scientist with a more specific tool than gene-targeted mutation for placement of the transgene.

• A. True
• B. False
• C. Partially true
• D. Neither true nor false

Answer: (B)

The correct answer indicates that pronuclear injection does not provide a more specific tool for transgene placement compared to gene-targeted mutations. In the context of transgenesis, pronuclear injection is a technique where foreign DNA is injected directly into the pronucleus of a fertilized ovum. While this method can successfully introduce transgenes, its integration into the genome is somewhat random, leading to unpredictable patterns of expression and potential positional effects. Gene-targeted mutation, on the other hand, utilizes techniques like homologous recombination to insert or modify genes at specific locations within the genome. This method is more precise, allowing for better control over where the transgene is placed and how it integrates into the host genome. Consequently, gene-targeted approaches generally lead to more consistent expression and function of the transgene, making it a more reliable and specific tool compared to pronuclear injection. Thus, the statement in the question is evaluated as false because gene-targeted mutation offers specificity in gene integration, which is not achievable with the random nature of pronuclear injection.

The correct answer indicates that pronuclear injection does not provide a more specific tool for transgene placement compared to gene-targeted mutations. In the context of transgenesis, pronuclear injection is a technique where foreign DNA is injected directly into the pronucleus of a fertilized ovum. While this method can successfully introduce transgenes, its integration into the genome is somewhat random, leading to unpredictable patterns of expression and potential positional effects.

Gene-targeted mutation, on the other hand, utilizes techniques like homologous recombination to insert or modify genes at specific locations within the genome. This method is more precise, allowing for better control over where the transgene is placed and how it integrates into the host genome. Consequently, gene-targeted approaches generally lead to more consistent expression and function of the transgene, making it a more reliable and specific tool compared to pronuclear injection.

Thus, the statement in the question is evaluated as false because gene-targeted mutation offers specificity in gene integration, which is not achievable with the random nature of pronuclear injection.