Race, Sex and Stature Determination MCQs

The pubis of the pelvic bone has long been regarded as the best sources of information for determining the sex of an unknown individual. The femur is the most useful long bone for sex determination, due to its length and massiveness. Sacrum is least reliable bone for sex determination. Subpubic concavity is also a good indicator of sex. The subpubic region is located on the pubis, inferiorly to the obturator foramen. In females, the subpubic region is concave, while in males the subpubic region is either straight or convex. Reference : Encyclopedia of Forensic and Legal Medicine, Page No. 131

The approximate height of the individual is 150 cm. The stature/femur relationship is 3.74. Thus, stature can be calculated by using the formula, stature = femur length x 3.74 = 40 x 3.74 = 149.6 cm = 150 cm The relationship between the mean stature and the mean length of the femur appears to be fairly stable around the world. However, this factor tends to overestimate tall and underestimate short individuals. Femur length shows a highly statistically significant correlation with stature. (r=0.88 in males and r=0.862 in females). This study revealed that the height of an individual is four times the femur length of the individual, since the femur length is proportional to the height, therefore the taller the individual the longer femur length, while the shorter the individual the shorter the femur length. Reference: Encyclopedia of Forensic and Legal Medicine, Volume 1, Page no: 104,

Explanation: The pelvis is the most reliable bone for sex determination, offering 95–98% accuracy. It exhibits distinct morphological differences related to childbirth in females: Female pelvis: Wide subpubic angle (>90°), broad sciatic notch, and oval pelvic inlet. Designed for childbirth. Male pelvis: Narrow subpubic angle ( Explanation of other options: Skull (Option A): Accuracy ~80%; males show pronounced brow ridges and square orbits. Long bones (Option C): Accuracy ~70%; depend on length and robustness. Sternum (Option D): Least reliable (~60% accuracy). Key takeaways: Pelvis = most accurate bone for sex estimation. Skull provides secondary confirmation. Useful in skeletal remains identification. References: Bones

The length of the vertebral column is 35% of the stature of an individual. The simple rule of thumb is that humerus is 20%, tibia 22%, femur 27% and the spine 35% of an individual's height in life. Reference : Review of Forensic Medicine & Toxicology, Gautam Biswas, 5th Edition, Page No. 103