Identity by type

From Wikipedia, the free encyclopedia

Alleles have identity by type (IBT) if they have the same phenotypic effect.

Alleles that are identical by type fall into two groups; those that are identical by descent (IBD) because they arose from the same allele in an earlier generation; and those that are non-identical by descent (NIBD) because they arose from separate mutations. Parent-offspring pairs share 50% of their genes IBD, and monozygotic twins share 100% IBD.

[edit] External links

• http://darwin.eeb.uconn.edu/eeb348/lecture-notes/identity.pdf
• http://zwets.com/pedkin/thompson.pdf