Biology Commons^™

Liger, Tigons And Bears (Oh My!): The Genomic Consequences Of Inter-Species Hybridization, Beth Shapiro

IMSA Great Minds Program ®

What makes a species? Driven largely by our natural inclination to categorize, we tend to think of all living things in discrete units – species – related to each other in a clearly defined taxonomic hierarchy into which every one fits neatly. New species emerge as evolutionary changes accumulate within one, leading to reproductive barriers that eventually split that one species into two. Hybrids, however, challenge this notion. As more and more genomes are sequenced, scientists are beginning to discover how common hybridization is in the wild, and that speciation may not be the directional – and irreversible – process …