Which of the following would be considered a transgenic organism?

• A. A bacterium that has been treated with a compound that affects the expression of many of its genes
• B. A human treated with insulin produced by E. coli bacteria
• C. A fern grown in cell culture from a single fern root cell
• D. All of the listed responses are correct.
• E. A rat with rabbit hemoglobin genes

Answer: (E)

Verified step by step guidance

1. Understand the definition of a transgenic organism: A transgenic organism is one that has had a foreign gene deliberately inserted into its genome.
2. Analyze the options given: A bacterium treated with a compound does not have a foreign gene inserted, so it is not transgenic.
3. Consider the human treated with insulin: The human is not transgenic because the insulin is produced outside the body by E. coli, not by inserting genes into the human genome.
4. Evaluate the fern grown in cell culture: This process does not involve inserting foreign genes into the fern's genome, so it is not transgenic.
5. Identify the correct option: A rat with rabbit hemoglobin genes has had foreign genes inserted into its genome, making it a transgenic organism.