Mutations, Last Post

[Jayd]

This will be my last thread on this subject. The point I was trying to make was: Any two "tiels can produce wonderful combination. Our Hammy,[Orange-cheek] and Pretty Mama,[Cinnamon] gave us, a White-faced-Lutino, a Cinnamon-Pied, and a Fawn. Each clutch they gave us assorted babys.

 

I mentioned in other threads that a male cockatiel inherits one X chromosome from his

father (let's call this chromosome "X1") and the other from his mother ("X2").

Each of these chromosomes can carry sex-linked mutations. The sex-linked

mutations that a male inherits from his father will occupy X1, and the ones he

gets from his mother will occupy X2. The important thing to remember here is

that the mutations on each X chromosome are always inherited together.

The mutations on X1 will travel together to the next generation (likewise for

the ones on X2).

 

Let's say that a lutino male and a cinnamon pearl female have one male chick.

One of the chick's X chromosomes (call it "X1") will carry lutino (from his

father), and the other ("X2") will carry cinnamon and pearl (from his mother):

X1: lutino

X2: cinnamon pearl

 

If this male is mated to a grey female, these are the possible results:

Male chicks:

50% grey split to cinnamon pearl (if they inherit X2)

50% grey split to lutino (if they inherit X1)

Female chicks:

50% cinnamon pearl (if they inherit X2)

50% lutino (if they inherit X1)

 

Note: It is not possible for any of the female chicks to be just pearl, just

cinnamon, or lutino pearl. She is limited to the combination of mutations on the

single X chromosome she inherits.