Homeobox genes are a large family of similar genes that direct the formation of many body structures during early embryonic development. In humans, the homeobox gene family contains an estimated 235 functional genes and 65 pseudogenes (structurally similar genes that do not provide instructions for making proteins).
Palindromes. A palindrome is a sequence of letters and/or words, that reads the same forwards and backwards.  able was I ere I saw elba  is a palindrome. Palindromes also occur in DNA.There are two types.. Palindromes that occur on opposite strands of the same section of DNA helix. 5' GGCC 3' 3' CCGG 5'. This type of palindrome serves as the target for most restriction enzymes. The graphic shows the palindromic sequences seen by five restriction enzymes (named in blue) commonly used in recombinant DNA work.
Palindromes are a type of palingram called letter palingrams. A palingram is a sentence in which the letters, syllables, or words read the same backward as they do forward. The sentence, He was, was he? is a word palingram, because the words can be placed in reverse order and still read the same. The sentence, I did, did I? is not only a word palingram but a letter palingram (or palindrome) as well. A number of interesting palindromes are given below for your amusement.