Multiple choice

The cis-trans test can determine whether a gene codes for

  1. an activator or a repressor

  2. an RNA or a protein

  3. a protein with the same or different amino acids

  4. a diffusible or non-diffusible product
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The cis-trans (complementation) test determines whether two mutations are in the same gene, which functionally tests whether a genetic unit encodes a single functional, diffusible product. If mutations in trans fail to complement, they affect the same functional product.

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