When a child inherits one set of six HLA genes together from one parent, this is called a(n)

When a child inherits one set of six HLA genes together from one parent, this is called a(n)

• A. genotype.
• B. haplotype.
• C. phenotype.
• D. allotype.

Answer: (B)

In genetics, a block of alleles that is inherited together on the same chromosome from one parent is called a haplotype. For HLA genes, those six loci are closely linked and tend to be passed along as a unit, so a child receives one haplotype from each parent. This differs from a genotype, which is the pair of alleles at a given locus (the two copies a person has). The phenotype is the outward traits resulting from those genes, while an allotype refers to a specific antigenic variant within an allele group, not the inherited block itself. So, the described scenario is a haplotype.

In genetics, a block of alleles that is inherited together on the same chromosome from one parent is called a haplotype. For HLA genes, those six loci are closely linked and tend to be passed along as a unit, so a child receives one haplotype from each parent. This differs from a genotype, which is the pair of alleles at a given locus (the two copies a person has). The phenotype is the outward traits resulting from those genes, while an allotype refers to a specific antigenic variant within an allele group, not the inherited block itself. So, the described scenario is a haplotype.