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  2. Genotype frequency - Wikipedia

    en.wikipedia.org/wiki/Genotype_frequency

    A De Finetti diagram visualizing genotype frequencies as distances to triangle edges x (AA), y (Aa) and z (aa) in a ternary plot. The curved line are the Hardy–Weinberg equilibria . A Punnett square visualizing the genotype frequencies of a Hardy–Weinberg equilibrium as areas of a square.

  3. Gene prediction - Wikipedia

    en.wikipedia.org/wiki/Gene_prediction

    Ab Initio gene prediction is an intrinsic method based on gene content and signal detection. Because of the inherent expense and difficulty in obtaining extrinsic evidence for many genes, it is also necessary to resort to ab initio gene finding, in which the genomic DNA sequence alone is systematically searched for certain tell-tale signs of protein-coding genes.

  4. Gene co-expression network - Wikipedia

    en.wikipedia.org/wiki/Gene_co-expression_network

    The concept of gene co-expression networks was first introduced by Butte and Kohane in 1999 as relevance networks. [6] They gathered the measurement data of medical laboratory tests (e.g. hemoglobin level ) for a number of patients and they calculated the Pearson correlation between the results for each pair of tests and the pairs of tests which showed a correlation higher than a certain level ...

  5. Allele frequency - Wikipedia

    en.wikipedia.org/wiki/Allele_frequency

    Allele frequency, or gene frequency, is the relative frequency of an allele (variant of a gene) at a particular locus in a population, expressed as a fraction or percentage. [1] Specifically, it is the fraction of all chromosomes in the population that carry that allele over the total population or sample size.

  6. Variable number tandem repeat - Wikipedia

    en.wikipedia.org/wiki/Variable_number_tandem_repeat

    Minisatellites are characterized by a repeat sequence of about ten to one hundred nucleotides, and the number of times the sequence repeats varies from about five to fifty times. The sequences of minisatellites are larger than those of microsatellites, in which the repeat sequence is generally 1 to 6 nucleotides. The two types of repeat ...

  7. DNA annotation - Wikipedia

    en.wikipedia.org/wiki/DNA_annotation

    Pseudogenes are identified by means of a phylogenetic analysis. First, a species tree of the species of interest and a phylogenetic tree of the gene (or gene family) of interest are constructed. The two are then compared to identify a species that has lost the gene.

  8. Linkage disequilibrium - Wikipedia

    en.wikipedia.org/wiki/Linkage_disequilibrium

    Σfxy = 1.g 1 + 0.g 2 + 0.g 3 + 0.g 4 = g 1. Σfx = g 1 + g 2 = p A. Σfy = g 1 + g 2 = p B. The covariance between x and y values is Σfxy - Σfx Σfy = g 1 - p A p B. which is equivalent to the LD coefficient, D, as defined above. It is usually convenient to calculate the correlation rather than the covariance, normalising by the variances:

  9. Dendrogram - Wikipedia

    en.wikipedia.org/wiki/Dendrogram

    A dendrogram is a diagram representing a tree. This diagrammatic representation is frequently used in different contexts: in hierarchical clustering, it illustrates the arrangement of the clusters produced by the corresponding analyses. [4] in computational biology, it shows the clustering of genes or samples, sometimes in the margins of ...