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9882 Microbiology

In humans, two closely linked genetic loci, each made up of two alleles, compose the histocompatibility locus (HL-A). Paired first and second locus antigens are called haplotypes. The HL-A haplotypes (separated by a semicolon) of a child’s parents are given below.Father 3, 25; 7, 12Mother 1, 3; 8, 9Assuming that no cross-over events have occurred, the child’s histotype could be which of the following?

A1, 3; 7, 8
B7, 12; 1, 3
C3, 3; 7, 9
D1, 25; 7, 12
Microbiology
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