X inactivation
X inactivation
Why does X-inactivation result in chimeras, individuals with genetically distinct areas of their bodies? In female mammals one X chromosome in every cell is inactivated. The inactivation occurs early in development when the embryo consists of only a few cells. The inactivation is random – one X chromosome may be turned off in one cell and the other X chromosome inactivated in a neighboring cell. Once a chromosome is turned off it remains turned off in all descendent cells. With respect to their X chromosomes, female mammals are chimeras. A chimera is an organism composed of different genotypes. Some areas of their bodies have one X chromosome turned off and other areas have the other X chromosome inactivated. An example of X-linked chimeras that can be seen visually are female cats that are heterozygous at the orange coat color locus. Orange is a locus on the X chromosome. Females with one allele for orange color and one for non-orange (tortoise shell and calico cats) have blotches of orange and other colors all over their bodies. Each blotch of color is composed of cells descended from a single cell in the embryo at the time of X-inactivation.
About BeeGames social
Playground and Play together are the BeeGames social layer — so you're never just playing alone.
What is a Playground?
Your Playground is your own personal game homepage. Pin the games you love, give it a name and a short bio, then make it public to share your personal arcade with anyone.
How do I use my Playground?
On any game page, tap “Playground” to pin that game. Head to My Playground to edit its name, bio and layout, then share your public link with friends.
What is Play together?
Play together lets you co-play the same game with friends in real time. Open a game room and everyone can play side by side while chatting in the room — like crowding around one screen, online.
How do I play with friends?
Tap “Play together” on a game page, pick a public room or a private one with a password, then share the room link with friends. You can also browse and join open rooms from the Lobby.