Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Deleterious mutations in a region flanking the S-locus mapped on the allelic genealogy of S-specificities S1,S2, and S3: Zygotes constituted from less closely related haplotypes bear fewer mutations in homozygous form: 1 mutation in homozygous form and 3 mutations in heterozygous form for S1=S2; and 1 homozygous and 4 heterozygous for S1=S3, Specificities S2 and S3, which diverged from their common ancestor more recently, share 2 mutations.
