Posted by **Michelle** on Wednesday, December 28, 2011 at 10:02pm.

A flock of migrating birds is blown off course by a storm and carried towards a small island that has no birds. Only three of the birds survive the storm and make it to the island. They start to reproduce and, after several years there are 500 birds on the island. Does the genetic variation in this population of birds results from a population bottleneck or founder effect? Explain.

- evolutionary machanism - BIOLOGY -
**Michelle**, Wednesday, December 28, 2011 at 10:04pm
2) Explain how genetic drift can lead to a reduction in the genetic variation within a population.

- Biology -
**Writeacher**, Thursday, December 29, 2011 at 6:53am
Since Jiskha does not have a regular biology tutor, you might try this site.

http://biology-forums.com/index.php

If there is a tutor here who can help you with this particular question, I'm sure he/she will add a response.

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