The phrase "at a fixed locus" is correct and usable in written English.
It can be used in contexts related to science, mathematics, or philosophy, where a specific point or location is being referenced.
Example: "The experiment was designed to measure the effects of temperature changes at a fixed locus within the chamber."
Alternatives: "at a designated point" or "at a specific location".
In agreement with recent electrophysiological studies, BOLD responses in V1 and V2 to a wedge stimulus at a fixed retinal locus decreased when the wedge location in head-centered coordinates was farther from the straight-ahead direction.
However, since these approaches require at least two alleles for comparison within a population, they are not applicable to already fixed loci, which are most likely to be under strong positive selection.
Then at any fixed locus, Kendall's tau between a fixed type of relative pair (i, j) is.
In the first scenario, at each locus, alleles at the founder population were sampled with a fixed probability value of p = 0.5.
This observation is consistent with the sequence variants being detected from more than one locus, and suggests that many of the variant sequence pairs A and B appear as heterozygous alleles at one locus (A/B) but are fixed at a second locus (i.e., A/A or B/B), resulting in a ~3:1 ratio of signal intensities on the GoldenGate assay.
As such, when a mutant allele at some locus fixed in the population, the frequency of the mutant was kept at fixation, removing the possibility of back mutations, for 3200 generations, the mutant frequency then being set to zero.
For example, if both maternal alleles at a locus are fixed by one sibgroup's reconstruction, then any other alleles found in offspring from a different mating of the same mother must have been inherited from the father.
Even if one allele is selectively superior to all others at a given locus, it will not become fixed in the population; recurrent mutation will ensure that other alleles are present at low frequency, thus maintaining a degree of polymorphism.
A first-generation hybrid (F1) was identified as one heterozygous for species-specific alleles at all loci; a backcross individual (BC) had at least one locus fixed for species-specific alleles for one of the two parental species, while all other loci were heterozygous for the species-specific alleles.
