When we try to assess what possible effects a duplication may have, we look at which genes (or sequences of DNA that control the activity of genes) are affected.

Common characteristics that occur in people with a 16p11.2 duplication include a low weight; a small head size (microcephaly); and developmental delay, especially in speech and language. …

If there is a history of blood in the stool, a technetium scan (radioactive tracer that is given to the child through an IV line) can detect a duplication cyst if the inside lining contains gastric tissue.

The rate of duplication that gives rise to stably maintained genes is the birth rate multiplied by the retention rate, which is expected to fluctuate with gene function, among other things. …

The most recent book on gene duplication, this edited volume examines post-duplication gene evolution and focuses on the mechanisms governing the retention and evolution of duplicate …

Family traits, environmental factors, and other genetic changes all contribute to how a 1q21.1 duplication affects a person. Researchers have published scientific articles about how this …

In complete duplication, the upper pole moiety is more prone to abnormalities than the lower pole moiety. The abnormality is usually hydronephrosis because of an obstructive process.