The sable gene is commonly considered
dominant to tan points but in its hetrozygous expression is in reality
|
what would would be called co-dominant . The reason for this is that the typical sable ( A hetrozygote of 'at-ay' ) yellow with dark overlay  )
is actually half way between tan points (
'at-at') and true sable(
'ay-ay'(clear yellow looks the same as buff ).
For simplicity it is assumed that these hypothetical cockers have at least one gene for black "B" 1. If you breed a buff 'ee' carrying 'AA' (solid) to a sable assuming it is the typical sable, 'ay at' (a yellow dog with black overlay) carrying 'EE' (non buff) you could expect to get all black puppies.chart 1sbb 2. If you breed a buff ('ee') carrying 'A' (solid) 'ay' (sable) to a typical sable '(at ay') carrying 'EE' (nonbuff) you could expect to get 50% black 25% typical sable 25% true sable (clear) (ay ay looks like buff) chart 2sbb 3. If you breed a buff ('ee') carrying 'ay' (sable) 'ay' (sable) to a typical sable ('ay at') carrying 'EE' (non buff) you could expect to get 50% true sable (looks like buff) 50% typical sable chart 3sbb
| 4. If you breed a buff
('ee') carrying 'ay' (sable) 'at' (tan pointed) to a typical sable ('ay
at') carrying 'EE' (non buff), you could expect to get
|
25% true sable (looks like buff) 50% typical sable 25% tan pointed chart 4sbb 5. If you breed a buff('ee') carrying 'at' (tan pointed) 'at' (tan pointed) to a typical sable ('ay at')carrying 'EE' (non buff) you could expect to get 50% typical sable 50% tan pointed chart 5sbb 6. If you breed a buff ('ee') carrying 'A' (solid) 'A' (solid) to a typical sable ('ay at') carrying 'E' (non buff) 'e' (buff) you could expect to get 50% black 50% buff chart 6sbb 7. If you breed a buff ('ee') carrying 'A (solid) 'A' (solid) to a typical sable ('ay at') carrying 'e' (buff) 'e' (buff) this dog would, also, be buff so 100% of the puppies would be buff. chart 7sbb 8. If you breed a buff ('ee') carrying 'A' (solid) 'ay' (sable) to a typical sable ('ay at')carrying 'E (non buff) 'e' ( buff )you could expect 50% buff 25% black 25% true sable (looks like buff) chart 8sbb 9. If you breed a buff ('ee') carrying 'ay (sable) 'ay' (sable) to a typical sable carrying 'E' (non buff) 'e' (buff) you could expect 50% buff 50% true sable (looks like buff) chart 9sbb 10. If you breed a buff ('ee') carrying 'ay' (sable) 'at' (tan pointed) to a typical sable carrying 'E' (non buff) 'e' ( buff ) you could expect 50% buff 25% typical sable 12 1/2% true sable (looks like buff) 12 1/2% tan pointed chart 10sbb 11. If you breed a buff ('ee') carrying 'at' (tan points) 'at' (tan points) to a typical sable carrying 'E'(non buff) 'e' (buff) you could expect to get 50% buffs 25% typical sable 25% tan pointed chart 11sbb |
Pages: |