A trisomy occurs when there are three copies of a chromosome in a cell instead of two copies. A partial trisomy occurs when only part of the extra chromosome is present, which can lead to disease symptoms similar to those of a normal trisomy.
A trisomy occurs when there are three copies of a chromosome in a cell instead of two copies. A partial trisomy occurs when only part of the extra chromosome is present, which can lead to disease symptoms similar to those of a normal trisomy.