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.
One of them is known as sex chromosomes. Other 22 are autosomes. Sex chromosomes are of 2 types; X and Y. Y is smaller, and X and Y are partially homologous. However, they pair and segregate into daughter cells during meiosis. Males have X and Y combinations. Females have X and X combination.