Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Coalescent times depend on the underlying reticulation history. Gray lines show example genealogical histories (for both the AB and BC topologies), focusing on the timing of the first coalescent event. (a) A reticulation history where speciation and introgression do not occur at the same time. (b) A reticulation history where speciation and introgression occur at the same time (as in HHS).
