Question

Dental formula of adolescent human being before seventeen year

• A. $\frac{2122}{2122}$
• B. $\frac{2123}{2123}$
• C. $\frac{2102}{2102}$
• D. $\frac{2023}{1023}$

Answer 1

Answer: (A)

$\frac{2122}{2122}$

• An adult human has 32 permanent teeth which are of four different types (Heterodont dentition), namely, incisors (I), canine (C), premolars (PM) and molars (M).
  
• The arrangement of teeth in each half of the upper and lower jaw in the order I, C, PM, M is represented by a dental formula which in humans is 2123/ 2123.
  
• The last molar teeth in each jaw are called wisdom teeth and are not present before seventeen years of age. Hence, in a human before 17 years of age, the dental formula will be 2122/ 2122.
  Hence, the correct option is A.