NEET BIOLOGY

Detailed explanation-1: -Most animal homeotic genes encode transcription factor proteins that contain a region called the homeodomain and are called Hox genes. Hox genes are turned on by a cascade of regulatory genes; the proteins encoded by early genes regulate the expression of later genes.

Detailed explanation-2: -homeotic gene, any of a group of genes that control the pattern of body formation during early embryonic development of organisms. These genes encode proteins called transcription factors that direct cells to form various parts of the body.

Detailed explanation-3: -encode transcription factors that control the expression of genes responsible for specific anatomical structures.

Detailed explanation-4: -Hox genes code for proteins that attach to molecular switches on DNA, turning other genes on and off. The DNA-binding piece of a Hox protein is called the homeodomain, and it’s encoded by the homeobox. The homeodomains in different Hox proteins are similar but not identical-they bind to different DNA sequences.