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.
They code for proteins which express traits. Through meiosis, four cells are created with half the required number of chromosomes. This is so that when they join up with another reproductive cell, it adds up to the required amount. Because of this, half of your DNA is from your mother, and half is from your father. Since DNA has sections called genes, it essentially codes for proteins, which express various traits in your body. Some might be for black hair, or a broad chest, or long toes, but every gene codes for a protein, and every protein is either expresses or repressed, according to the specific gene.