HOX gene | biochemistry | Britannica
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evolution
In evolution: Evolution and development
All animals have Hox genes, which may be as few as 1, as in sponges, or as many as 38, as in humans and other mammals. Hox genes are clustered in the genome. Invertebrates have only one cluster with a variable number of genes, typically fewer than 13.…
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homeotic genes
- In homeotic gene
…are commonly referred to as HOX genes. Humans possess some 39 HOX genes, which are divided into four different clusters, A, B, C, and D, which are located on different chromosomes.
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