Abstract
HOX genes are a subgroup of the Homeobox family characterized by high degree of conservation among fungi, plants and animals. In mammals, there are 39 HOX genes distributed in four groups or clusters: HOXA, HOXB, HOXC and HOXD, located on chromosomes 2, 7, 17 and 12, respectively. HOX genes are transcription factors that act during embryonic development, regulating fundamental biological …