DMIT Genetic & Developmental Basis of Fingerprints 1

Question 1

During which week of fetal development do fingerprint ridge patterns begin to form?

Accepted Answer

10th to 16th week

Answer

Fingerprint ridge patterns (dermatoglyphics) begin forming between the 10th and 16th weeks of fetal development and are permanent by the end of the second trimester.

Question 2

Which skin layer is primarily responsible for forming the ridge patterns seen in fingerprints?

Accepted Answer

Epidermis

Answer

The epidermis, specifically the basal layer interacting with dermal papillae, forms the ridge patterns that create fingerprints.

Question 3

What is the primary reason identical twins have different fingerprints even though they share the same DNA?

Accepted Answer

Random environmental factors in the womb affecting ridge formation

Answer

Even identical twins share the same DNA, but minor differences in womb position, amniotic fluid pressure, and random developmental variation cause distinct ridge patterns to form.

Question 4

In dermatoglyphics research, the term 'Total Ridge Count' (TRC) refers to:

Accepted Answer

The sum of ridge counts across all ten fingers

Answer

Total Ridge Count (TRC) is calculated by summing the individual ridge counts from all ten fingers, and it is used as a quantitative measure in genetic studies.

Question 5

Which scientific field first established the study of fingerprint ridge patterns as a means of understanding human genetics and development?

Accepted Answer

Dermatoglyphics

Answer

Dermatoglyphics, coined by Harold Cummins in 1926, is the scientific field dedicated to studying skin ridge patterns and their genetic and developmental significance.

DMIT - Dermatoglyphics Multiple Intelligence Test Practice Test

DMIT - Dermatoglyphics Multiple Intelligence Test Practice Test

DMIT Genetic & Developmental Basis of Fingerprints 1