USGS - science for a changing world

Ecosystems - Genetics and Genomics

Maps, Imagery, and Publications Hazards Newsroom Education Jobs Partnerships Library About USGS Social Media

Genetics and Genomics Glossary

The following glossary was obtained with permission from the following resource: Allendorf, F.W., and G. Luikart. 2007. Conservation and the Genetics of Populations. Blackwell Publishing. 642 pp.



Ocham’s razor
The principle that the least complicated explanation (most parsimonious hypothesis) generally should be accepted to explain the data at hand.

offsite conservation
See ex situ
conservation.

outbreeding depression
The relative reduction in the fitness of hybrids compared to parental types.

outlier loci
Loci that may be under selection (or linked to loci under selection) that are detected because they fall outside the range of expected variation for a given summary statistic (e.g., extremely high or low FST compared to most “neutral” loci in a sample).

overdominance
See
heterozygous advantage.

overlapping generations
A breeding system where sexual maturity does not occur at a specific age, or where individuals breed more than once, causing individuals from different brood years to interbreed in a given year.

 

 

 

 

 

 

 

 

 

 

 

Accessibility FOIA Privacy Policies and Notices

Take Pride in America logo USA.gov logo U.S. Department of the Interior | U.S. Geological Survey
URL: http://www.usgs.gov/ecosystems/genetics_genomics/\\afs\usgs.gov\www\www\htdocs\ecosystems\genetics_genomics\glossary_o.html
Page Contact Information: Ask USGS
Page Last Modified: Monday January 14 2013