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- variable site or region
- (1) A site or region within the DNA that is occupied by different nucleotides among the sequences under comparison. (2) Strictly, a site or region within the DNA that can vary with time.
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- variant repetition
- The existence of repeated products of gene duplication that have diverged from each other since the duplication event.
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- viability
- A fitness component. The probability that an individual of a given genotype survives from conception to reproductive age.
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- virion
- A virus particle.
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- virus
- A small parasite that depends on the host cell to replicate its genetic material and synthesize its proteins. Its genome can be either RNA or DNA and can be either single- or double-stranded.
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