homeotic gene
Noun: A homeotic gene is a specific type of gene that controls the identity and development of body segments or structures during the embryonic growth of an organism. Mutations in these genes can cause one body part to develop in the place of another.
Homeotic genes are fundamental concepts in developmental biology. * They are studied to understand how complex body plans are established. * Scientists analyze homeotic gene expression patterns. * A mutation in a homeotic gene can lead to dramatic developmental changes.
- The homeotic gene in fruit flies, when mutated, causes legs to grow where antennae should be.
- Researchers have identified a family of homeotic genes known as in many animals.
- The precise regulation of each homeotic gene is critical for normal embryologic development.
- Homeotic transformation: This term describes the phenomenon where one body structure is replaced by another, which is the direct result of a mutation in a homeotic gene. For example, a homeotic transformation in a fly might result in a wing growing where an eye should be.
- Hox gene (n): A major subgroup or cluster of homeotic genes found in animals, responsible for patterning the anterior-posterior (head-to-tail) axis.
- Homeobox (n): A specific, conserved DNA sequence found within homeotic genes that codes for a protein domain (the homeodomain) which binds to DNA and regulates other genes.
- Selector gene: A term sometimes used interchangeably with homeotic gene, emphasizing its role in selecting the developmental fate of a group of cells.
The term homeotic gene is highly specific to the field of genetics and developmental biology. Its meaning is precise and does not have common idiomatic or phrasal verb uses outside of this technical context. Its primary function is to describe a class of genes with a master regulatory role in embryology.
- one the genes that are involved in embryologic development