Related Experiment Video
Updated: Oct 2, 2026

Visually Sexing Loggerhead Shrike (Lanius Ludovicianus) Using Plumage Coloration and Pattern
Published on: March 8, 2020
Genetic evidence for male biased dispersal in the red-billed quelea Quelea quelea
M Dallimer1, C Blackburn, P J Jones
1Institute of Cell, Animal and Population Biology, University of Edinburgh, King's Buildings, Edinburgh EH9 3JT, UK.
Abstract:
In order to detect sex-biased dispersal in the red-billed quelea Quelea quelea in southern Africa, we used the assignment index technique to determine the probability that individuals originated from the population in which they were sampled. This is the first time that this multilocus genetic test has been used in a bird species and is informative despite evidence that the population under study exhibits little genetic structure. There was a pattern of male-biased dispersal, the first example in a passerine, and the first time that evidence of a sex-biased pattern of dispersal has been shown for queleas.
Related Concept Videos
Mate Choice
Gene Flow
The Evidence for Evolution
The Y Chromosome Determines Maleness
Evolution
Around 300 million years ago, the two sex chromosomes diverged from two identical autosomal chromosomes. Over time, the Y chromosome has lost most of its genes, shrinking in size. Today,...
Genetics of Speciation
The Ratio of X Chromosome to Autosomes
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...

