Multiple choice

All of the following are believed to contribute to genomic diversity among various species except

  1. gene duplication

  2. gene transcription

  3. lateral gene transfer

  4. chromosomal rearrangements
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Gene transcription is the process of making RNA from DNA - a routine cellular function that happens constantly and does not create genetic diversity. Gene duplication creates extra copies that can evolve new functions. Lateral gene transfer moves genes between species. Chromosomal rearrangements alter gene structure and regulation. The latter three processes increase genomic variation, while transcription merely maintains existing genetic information.

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