What evolutionary force is at work here

[sp1nn3r]

In 1789, a small band of mutineers led by Fletcher Christian took over the British warship
HMS Bounty and fled to tiny Pitcairn Island in the South Pacific. There the sailors joined a
small population of native Polynesians, married, and raised families. All contemporary
Pitcairn islanders can trace at least part of their family tree back to the colonization event.
What evolutionary forces were at work in this small, isolated population before, during, and
after the arrival of the mutineers?

[Cat]

Read this and decide:

http://epress.anu.edu.au/austronesians/ ... 09s04.html