An example of analogy used in popular science writing:
"It is clear that such reshuffling of genes between two chromosomes of a pair, or within a single chromosome, will more probably affect the relative positions of those genes that were originally far apart than those that were close neighbours. Exactly in the same way, cutting a pack of cards will change the relative positions of the cards below and above the cut (and will bring together the card that was at the top of the pack and that card that was at the bottom) but will separate only one pair of immediate neighbours."
George Gamow (1961) One, Two, Three…Infinity. Facts and speculations of science, Revised Edition, Dover Publications, Inc., New York.
Read examples of scientific analogies