Which of the following is the gene for sex determination?

 # Which of the following is the gene for sex determination?

A. HOX

B. Shh

C. SRY

D. Rb gene

The correct answer is C. SRY.

Some species (including humans) have a gene SRY on the Y chromosome that determines maleness. Members of SRY-reliant species can have uncommon XY chromosomal combinations such as XXY and still live. Human sex is determined by the presence or absence of a Y chromosome with a functional SRY gene. Once the SRY gene is activated, cells create testosterone and anti-müllerian hormone which typically ensures the development of a single, male reproductive system. In typical XX embryos, cells secrete estrogen, which drives the body toward the female pathway.

Torque in orthodontics refers to:

 # Torque in orthodontics refers to:

a. The change in mesiodistal inclination of teeth

b. The change in labiolingual inclination of teeth

c. The rotation of teeth

d. None of the above

The correct answer is B. The change in labiolingual inclination of teeth.

Torquing is considered as reverse tipping during which there is movement of root only without the movement of the crown. This type of tooth movement is usually used to correct the effects of uncontrolled tipping. 

Orchid Multispeciality Dental Clinic, Damak Jhapa

 Name of Dental Clinic: Orchid Multispeciality Dental Clinic

Address (Full): Province 1, Jhapa Damak-8 

Year of Establishment: 2080

Name of the chief Dental Surgeon: Dr. Pawan Singh

CONTACT NUMBER: 9819239757

NMC Number of Dental Surgeon: 17464

CLICK HERE TO VIEW ALL DENTAL CLINICS OF NEPAL LISTED PROVINCE-WISE

Which of the following materials used in orthodontics commonly causes sensitivity?

 # Which of the following materials used in orthodontics commonly causes sensitivity?

A. Steel

B. Ceramic

C. Nickel

D. Plastic

The correct answer is C. Nickel.

Most allergies in orthodontics are related to latex and nickel. Nickel can evoke IgE-mediated (immediate) and cell-mediated (delayed) hypersensitivity reactions.