Multiple choice

Phenotypically silent DNA sequences that are not expressed during life cycle of an organism are called:

  1. Cryptic genes

  2. Split genes

  3. Constitutive genes

  4. Pseudogenes

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A Correct answer
Explanation

Cryptic genes are DNA sequences that exist in the genome but are not expressed during the normal life cycle of an organism. Split genes contain introns and exons, constitutive genes are always expressed, and pseudogenes are non-functional copies of genes that lost their protein-coding ability.