Immunity Region At Biology Glossary
What is it? The region of a lysogenic phage that encodes the major regulator of lysogeny and the cognate DNa binding sites (e.g. lambda cI protein and the leftward and rightward operator sites).Bio Definition Added By: Bryce
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Other Similar Biology Terms:
Bio Term immunoglobulin gene is A gene encoding one of the protein chains (light or heavy) of an immunoglobulin. The germline genes are activated by a special recombination process that joins a number of different gene segments together. In the case of immunoglobulin light chains there are three segments (V variable, J joining and C constant). In the case of immunoglobulin heavy chains there are four segments (V variable, D diversity, J joining and C constant). There are many different V segments (light chains ~300, heavy chains ~500), 4 J segments in both light and heavy chain genes, 12 D segments in the heavy chain gene and 1 C segment in light chain genes, 5 C segments in heavy chain gene. The recombination process appears to be able to join any V with any J (light chain) or any V to D to J (heavy chain). The total number of possible immunoglobulins (ie the number of possible light chains times the number of possible heavy chains) that can be generated by this mechanism is thus several 10s of millions (300x4x500x12x4=28800000). It is certain that the number is greater than this because the recombination events themselves are not precise and random loss of nucleotides from each recombining end occurs.Bio Term parental is See non-recombinant.
Bio Term Mendels second law is The law of independent assortment; unlinked or distantly linked segregating gene pairs assort independently at meiosis.
Bio Term kin selection is The mode of natural selection that acts on an individuals inclusive fitness.
Bio Term codominance is A phenomenon in which two alleles of the same gene are fully expressed in the phenotype when both are present in a heterozygote. Blood type is an example of codominance.