The right answer is C.
In population genetics, we say that there is linkage disequilibrium if the frequency of the alleles of two different loci A and B is different from what would give a random association of these alleles. In other words, it is a sign that there is a preferential association between two alleles.
Locus C is the right answer.
Further explanation
Chromosomes
It can be defined as a threadlike structure of nucleic acids and protein found in the core of most living cells, conveying hereditary data as qualities.
Allele
It is a variant type of a given gene. Sometimes, various alleles can bring about various perceptible phenotypic attributes, for example, extraordinary pigmentation. A striking case of this quality of shading variety is Gregor Mendel's disclosure that the white and purple blossom hues in pea plants were the consequence of "pure line" characteristics that could be utilized as a control for the future tests. Nonetheless, most hereditary varieties bring about practically zero recognizable variety.
Most multicellular creatures have two arrangements of chromosomes; that is, they are diploid. For this situation, the chromosomes can be combined: each pair is comprised of two chromosomes of a similar kind, known as homologous chromosomes. In the event that the two alleles at a quality (or locus) on the homologous chromosomes are the equivalent, they and the life form are homozygous regarding that quality (or locus). In the event that the alleles are unique, they and the living being are heterozygous as for that quality.
Locus
Locus can be defined as specific position of a gene on chromosome. Loci is the plural of locus.
Answer details
Subject: Biology
Level: High school
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