Both deletions and insertions occur during the evolution of microbial genomes. Insertions bring in new genes that may be useful for the cell. Deletions
A) may increase fitness of a microorganism by eliminating unneeded genes.
B) always result in a severe loss of fitness for the microorganism.
C) are uncommon because they are usually lethal.
D) always result in a severe loss of fitness but keep microbial genomes compact.

Question

Quizplus · Accepted Answer

Deletions may increase fitness of a microorganism by eliminating unneeded or harmful genes. While some deletions may have negative effects, others may be beneficial by streamlining the genome and reducing the metabolic burden of unnecessary genes. In this way, deletions can also contribute to the compactness and efficiency of microbial genomes.

Both Deletions and Insertions Occur During the Evolution of Microbial