Chromosomes, genes and DNA are 3 main genetics and biotechnology definitions that are targets of personal medicine and understanding mechanism, structure and function of each chromosome can help us have a better solution for a better life.
Females have two X chromosomes, while males have one X and one Y chromosome. A picture of all 46 chromosomes in their pairs is called a karyotype. A normal female karyotype is written 46, XX, and a normal male karyotype is written 46, XY.