VARIABLE. “Two main sex chromosome systems can be found in vertebrates with genetic sex determination: XX/XY (in which males are heterogametic) and ZZ/ZW (with heterogametic females). Nevertheless, sex chromosomes are extraordinarily variable, and other combinations also can be found, ranging from female heterogamety with 00/0W or ZZ/Z0 sex chromosomes to male heterogamety with XX/X0 sex chromosomes. Furthermore, complex XY and ZW systems are possible when fusions, fissions, and translocations between sex chromosomes and autosomes take place (e.g., X1X2Y, XY1Y2, or Z1Z2W).”
https://lnkd.in/gvD548n
linkedin post 2022-06-29 05:12:48
Nigel Fleming
September 21, 2022