1. Holandric gene: The gene present in Y-chromosome is called Holandric gene. This is the human ear hair expressing gene.
2. Sex-chromosomal gene: The gene present in X-chromosome is called sex-chromosomal gene. It is responsible for hemophilia, color blindness etc.
3. Autosomal gene: The gene present in autosome is called autosomal gene. It is responsible for baldness, albinism etc.
4. Split gene: A gene that consists of introns and exons is called a split gene.
5. Trans gene: A gene that takes characteristics from one cell and replaces it in another cell is called trans gene.
6. Lethal gene: The expression of the gene causes the death of the organism is called lethal gene.
7. Pseudo gene: A gene that is inactive or does not form a polypeptide is called a pseudo gene.
8. Oncogene: The gene that causes cancer is called oncogene gene.
9. House keeping gene: These are called constitutive genes. These genes are constantly active to carry out the normal functions of metabolic cells.
10. Luxury gene: These are called non-constitutive genes. These genes are not constantly active. It is activated only when needed.
11. Luxury gene: The gene used in genetically modified crops is the terminator gene. It prevents the plant from producing fertile seeds.