Table 4.

Summary of genotyping errors observed in the NMDR according to laboratory.

	Lab 1			Lab 2			Lab 4
Type of error	Total	= 1 bp	>1 bp	Total	= 1 bp	>1 bp	Total	= 1 bp	>1 bp
Single false allele size	10	7	3	2	0	2	0	0	0
Double false allele size	6	1	5	0	0	0	0	0	0
False homozygote	9	5	4	1	1	0	0	0	0
False heterozygote	2	0	2	0	0	0	1	0	1

Columns labeled "Total" contain the total number of errors of a specific kind for each laboratory. False allele size is when an allele was erroneously sized compared to the true size for single and double alleles. " = 1 bp" denotes that the erroneously called allele is a distance one from the true allele, whereas ">1 bp" means that the distance was greater than one. False homozygote is where the true genotype was a heterozygote, and false heterozygote is where the true genotype was a homozygote.