Polygenic inheritance. Definition. noun. A non-Mendelian form of inheritance in which a particular trait is produced by the interaction of many genes.Supplement.Polygenic inheritance refers to the kind of inheritance in which the trait is produced from the cumulative effects of many genes in contrast to monogenic inheritance wherein the trait results from the expression of one gene (or one gene pair). non-Mendelian form of inheritance in which a particular trait is produced by the interaction of many genes.
Celtic Thunder, the singing group from Ireland, are a composition of six male soloists who perform both solo and ensemble numbers.
Case Report. 1  A thunderclap headache is a severe headache with sudden onset similar to a clap of thunder, with a maximum intensity within 1 minute. 2  Although Day and Raskin[1] initially coined the term thunderclap headache to refer to the headache associated with an unruptured aneurysm, the most common secondary cause is subarachnoid hemorrhage.