Question7 1 pts What would be an appropriate evolutionary explanation of the fac

Question

Question7 1 pts What would be an appropriate evolutionary explanation of the fact that the ordering of some homeotic genes (such as Hox genes) on vertebrate chromosomes parallels the ordering of homeotic genes on fruit fly chromosomes? O Homeotic genes of different animal lineages might be ordered in a similar fashion, yet their sequences are completely different. Homeotic genes show that insects and vertebrates are closer relatives than the traditional classification system indicates. The similarity is a coincidence, not documented in other invertebrates and largely a result of random mutations. O The similar ordering of homeotic genes in animals, both vertebrate and insect, is due to ancient homology.

Explanation / Answer

ordering of homeotic genes on vertebrate is parallel to ordering of homeotic genes on fruitflies. This similarity is due to ancient homolgy. Homeobox was present in ancestor which have undergone process of duplication and divergence. So same homeobox duplicated and its copies in chromosome increased, while duplicating gene gradually changed that lead to diversification. So similarities between homeotic genes are present. They also show similarity in function.

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