Option (D) presence of Hox is correct.
Animals ranging from corals to monkeys have the presence of Hox in common.
What is Hox?
- Hox genes, a subset of homeobox genes, are a collection of linked genes that define areas of an embryo's body plan along the animal head-to-tail axis.
- Hox proteins determine and encode the qualities of "position," ensuring that the right structures form in the right locations throughout the body.
- The genetic underpinning of embryonic patterning is shared by all metazoans due to the extraordinary interspecies conservation of these genes.
- There are a total of 39 Hox genes in vertebrates, specifically in humans and mice, and they are divided into 4 different clusters.
- The fast diversification of the body plans of all Bilaterians has been attributed in large part to the growth and evolution of the Hox genes.
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