基因是一段被复制或重组的生物信息，这种复制或重组会传递给下一代。
A gene is a piece of biological information that gets copied or replicated, and the copy or replica is passed on to the new generation.
物竞天择确保只有最适应环境的物种才得以生存下来，把基因传递给下一代。
Natural selection ensures only the fittest survive to pass their genes on to the next generation.
基因标记会在短时间内将新特性传递给下一代。
These genetic imprints can short-circuit evolution and pass along new traits in a single generation.
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