TASC: For
Breeders: Sex-Linked Red and Tortie Abys and Somalis
The O and o genes are called sex-linked because they are carried
only on the X chromosome. Normal females have two X chromosomes
and normal males only one, so only females have two copies of the
gene. This is why torties are female. Since this is an entirely
separate gene from the B, b and bl genes, torties come
in all the same colors as traditional Abys and Somalis. The areas
of the cat where the O gene is expressed are unaffected by the B,
b or bl genes passed on by the parents unless the dilute
gene is also expressed.
| Keys: |
OO = red female
O = red male
oo = non-red female
o = non-red male
Oo = tortie female |
Red = sex-linked red (orange)
Non-Red = any other color-
ruddy, red (sorrel), blue, fawn, etc. |
| |
Dam |
| Red |
Non-Red |
Tortie |
| OO |
oo |
Oo |
| Sire |
Red |
O |
OO (Red Female) |
Oo (Tortie Female) |
OO (Red Female) |
Oo (Tortie Female) |
| O (Red Male) |
o (Non-Red Male) |
O (Red Male) |
o (Non-Red Male) |
| Non-Red |
o |
Oo (Tortie Female) |
oo (Non-Red Female) |
Oo (Tortie Female) |
oo (Non-Red Female) |
| O (Red Male) |
o (Non-Red Male) |
O (Red Male) |
o (Non-Red Male) |
This page was last updated on November 25, 2000.
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