Which One of the Following Statements About Homeotic, or Hox

Multiple Choice

Which one of the following statements about homeotic, or Hox, genes is NOT correct?

A) Drosophila contain 8 Hox genes arranged in two clusters, the Antennapedia complex and the Bithorax complex.
B) Hox genes are arranged in order according to their relationship with the anterior-posterior segmentation.
C) Timing of expression corresponds to chromosomal order and location of expression. For example, anterior genes "turn on" earlier compared to those expressed in the posterior.
D) The linear order of Hox genes along the chromosome, the anterior-posterior orientation of the embryo, and timing of expression for the genes in Hox clusters is observed only in Drosophila.
E) Many of the genes in the mammalian Hox clusters have redundant or overlapping functions.