Phaser is a program for identifying linkage to recessive or dominant genes by reconstructing the haplotype for each individual's chromosome in a pedigree linked to a disease.

Phaser showing regions on chromosome 8

Feature guide

A “walk-through” explanation, with screenshots, of how to use Phaser:

HTML guide


The download page currently offers a preview version of the Phaser program and some sample data files, used in the examples shown in the online Guide.

Phaser has been written by Ian Carr. It is still undergoing testing, and any feedback on its features or performance would be very welcome.



Carr IM, Diggle DP, Touqan N, Anwar R, Sheridan EG, Bonthron DT, Johnson CA, Ali M, Markham AF.
Identification of autosomal recessive disease loci using out-bred nuclear families.
Hum Mutat. 2012 Feb;33(2):338-42.