Hox gene is an example of a homeobox gene. The homeobox sequence codes for a 60 amino acid protein domain known as the homeodomain. The main role of homeodomain is to act as a switch that controls gene transcription.
(Histone modification hassome attributes of an epigenetic process, but the issue ofheritability has yet to be resolved.) This review concernsDNA methylation, focusing on the generation, inheri-tance, and biological significance of genomic methyl-ation patterns in the development of mammals.
DNA replication: DNA strand synthesized from 5' to 3' end. Starts at origin of replication which is a sequence that have a specific sequence of nucleotides which tells it where to begin. Proteins that initiate DNA replication recognize sequence, bind to it and separate the strands and open up replication bubble. Goes in both directions until the entire molecule is copied. At the end of each bubble is a replication fork, the region where the strands are being unwound.