<prompt> Homeobox gene is responsible for:Segmental organization of embryo in craniocaudal directionProper organization along dorsal ventral axisStimulation for lengthening of limbsAll of the above  <response>: Ans. A Segmental organization of embryo is craniocaudal directionRef: Netters Atlas of Human Embryology, 2012 ed. pg. 10 Homeobox HOX gene is involved in segmental organization of embryo in cranio-caudal direction. The mutation in gene leads to formation of appendages in wrong locations. Sonic hedge-hog gene is involved in patterning in A-P axis. The mutation in this gene leads to holoprosencephaly. 