Life may “find a way,” but how living things evolve is not a neat and orderly process. Instead of a tidy family tree with straight lines added for each new generation, the birth of a new species is much more tangled in reality. New research into one butterfly genus found in the Amazon shows just how entangled those evolutionary lines may be. Hybrids between some species can produce new butterfly species that are genetically distinct from both parent species and their earlier ancestors.
Neil Rosser For a deeper look into Heliconius’ evolution, the team on this new study harnessed the power of whole-genome sequencing. All living organisms have DNA that is made of four nucleotide bases–adenine, thymine, cytosine, and guanine. If you know the sequence of bases, you can identify the organism's unique DNA fingerprint called a pattern. Sequencing determines these patterns and whole genome sequencing in a lab can determine the orders of these bases in one process.
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