Consider two species, one of which has an effective population size that is five orders of magnitude greater than the other. In which species would you expect to see a smaller genome size? Explain your reasoning

What will be an ideal response?


ANS:
The species with the larger effective population size is expected to have the smaller genome. In larger popula-tions, selection is expected to be able to remove deleterious mutations with even a small effect on fitness. Thus, a slightly deleterious noncoding region of the genome can be more quickly removed from a genome, thereby resulting in a genome of smaller size.

Biology & Microbiology

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