This image shows the Hox genes for a fruit fly, and which parts of the fly embryo and adult they code for. Describe a possible developmental problem in the fruit fly if the fifth (yellow) Hox gene was mistakenly activated in the head area.

Mutations in this Hox gene cause a small, malformed jaw in mice, “split-hand/foot malformation” in humans, and legs and antennae popping up where they don't belong, or missing where they do belong, in flies

Explanation:

The Yellow is the problem.

The head the thorax and abdomen.

I hope that helps

igneous rocks are formed by solidification of cooled magma (molten rock), with or without crystallization, either below the surface as intrusive (plutonic) rocks or on the surface as extrusive (volcanic) rocks.  

the composition depends on the source magma. there are almost a thousand types of composition found till now.  

hope this