It would be your third option. because if you look at the reproductive system both the sperm and the egg carry different amounts of genetic information.
Answer:
"The ratio between the length of the femur and the stature of that individual is significant in Forensic science and anthropology. The measurements of segment-1 and segment-2 of the femur can be used in determining the length of the femur in case only the proximal part of the femur is available"