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evidence provided from studies in iran points to a possible bias in application of the standard epi cluster sampling procedure, when carried out in populations with highly variant birth rates, tends to over-represent the low birth rate, i.e. higher socio-economic, strata, and if the entity under study shows significant socio-economic gradient, then the estimates arrived at by this method might ...

homeobox (hox) genes are contributed in the genetic control of development of the body plan, pattern formation, and cell fate determination and the other several key developmental processes. hox genes are also known as selector genes because expression within a given section of the embryo will cause its cells to choose a particular developmental path. hox genes encode transcription factors that...