Them XX was created in 2009.
A female is an XX. However, during development one of the X chromosomes is deactivated and is called a Barr body.Human females have XX sex chromosomes. A male has XY chromosomes. The Y chromosome is very small and contains only genes that make a male a male.
9:3:3:1 was the ratio of Mendel's f2 generation for the two factor cross.
It will yield two types of phenotypes Xx and xx. There will be a 50% chance of the baby yeilding an Xx and a 50% chance of the baby yeilding xx ---- ----
For the case of the human, an individual with XX genotype is female. Other organisms have different ways of determining sex.
Female.
Les XX was created in 1883.
Toto XX was created in 1998-12.
XX Bomber Command was created in 1941.
The notorious xx was created on 2010-03-25.
XX Years Live was created in 1992.
A Film for XX was created in 1999.
Treehouse of Horror XX was created on 2009-10-18.
XX Corps - United States - was created in 1943.
Rumble Roses XX was created on 2006-03-28.
XX Corps - Union Army - was created in 1863.
XX Army Corps - Germany - was created in 1940.
Islands - The xx song - was created on 2009-10-26.