What is chromosome duplication?
: What is chromosome duplication? A duplication is just that, a duplication of a section of a chromosome. A duplication is sometimes referred to as a ‘partial trisomy’. Trisomy refers to three. Therefore if a duplication exists, that individual has three copies of that area instead of two. This means there are extra instructions (genes) present that can cause an increased risk for birth defects or developmental problems. In the picture, red arrows point to identical bands on each chromosome. The blue arrow points to a duplication of the band at the red arrow. You can see that the chromosome on the right is longer. The nomenclature for this abnormality would be: 46,XY,dup(7)(q11.2q22) Male with a duplication of chromosome 7 on the long arm (q) between bands 11.2 to 22. What is chromosome ring? : What is chromosome ring? A ring chromosome can happen in two ways. One is demonstrated in the picture; the end of the p and q arm breaks off and then stick to each other. The blue parts of each
