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.
A flow chart of data preparation and analysis. Four historical scenarios include bottleneck, expansion, decline and constant population size. T0 is the closest sampling timepoint to the current time and T2 is the ancestral sampling timepoint, which is the farthest from the current time.
