Transgenic animals have their genetic material manipulated. Select the correct option in reference to transgenic animals.
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Transgenic animals contain foreign DNA in all their cells, which is integrated into their genome. This allows them to express new traits or produce specific proteins for research or medical use.
Step 1: Understanding transgenic animals.
Transgenic animals are genetically modified organisms that have foreign DNA introduced into their cells. This foreign genetic material can be integrated into their genome, leading to the expression of new traits.
Step 2: Analysis of the options.
- (A) Foreign DNA and RNA are present in their cells: Incorrect. While foreign DNA is integrated into the cells of transgenic animals, the presence of foreign RNA is not guaranteed in all cases, as RNA is typically transcribed from the foreign DNA but not always present in all cells.
- (B) Foreign RNA is present in all of their cells: Incorrect. While foreign RNA may be expressed, it is not necessarily present in all cells, as it is usually transcribed from the foreign DNA when required.
- (C) Foreign DNA is present in all of its cells: Correct. Transgenic animals typically have foreign DNA integrated into all of their cells, as the foreign DNA is integrated into the genome and inherited by all cells in the organism.
- (D) Foreign RNA is present in some of its cells: Incorrect. While foreign RNA might be present in certain cells, it is not a characteristic of all transgenic animals, as foreign RNA is typically present in the cells where the transgene is expressed.
Step 3: Conclusion.
Therefore, the correct answer is (C) Foreign DNA is present in all of its cells, as transgenic animals inherit the foreign DNA in all their cells.
Final Answer: Foreign DNA is present in all of its cells.
