Os acetabuli and mixed-type FAI. This 79yo male with a history of right hip pain for 1 month has features of both pincer and cam-type FAI. Femoral head asphericity (yellow arrow), irregular anterosuperior bump (green arrowheads), os acetabuli (yellow arrowhead) and hypertrophic acetabular rim (blue arrow).
1 The other 22 pairs are autosomes (non-sex chromosomes) and look the same for both males and females. 2  The DNA making up each of our chromosomes contains thousands of genes. 3  At the ends of each of our chromosomes are sections of DNA called telomeres.
Chromosomes are molecules that consist of a very long strand of DNA coiled many times, and a few proteins called histones which hold the whole structure together. To put things very simply, chromosomes are made up of genes and genes are made of DNA. gene is a section of the DNA that codes for something, like hair color. DNA is a double helix of nucleic acids. DNA twists and folds to create a structure called a chromosome. Source(s): B.S. in Neurobiology.