Quote:
Which clams are you referring to?
If you cross a Golden Sebright over a Silver Sebright you will get (as adults) Black patterned Yellow/Golden laced Males and Black patterned Gold laced Females.
If you cross a Silver Sebright over a Golden Sebright you will get (as adults) Black patterned Yellow/Golden laced Males and Black patterned Silver laced Females.
This cross works the same as if you cross a Golden Duck-wing with a Silver Duck-wing or a Rhode Island Red and a Columbian Rock. It is a "Sex-link" cross.
Chris
Does it work the same for the Buff seabrights hens and the silver seabright Roo, as it does for the Golden and Silvers?? Just wondering if it was because what I have is a silver seabright Roo and ! silver seabright Hen and one Buff or what Ideal referred to as A Buff seabright? I have a set of mixed seabright eggs under a broody and it would be great to be able to sex them early on.
Thanks Sandy
Genetics 101
You will not be able to sex the chicks if the cross is silver male over buff or gold sebright. Read the following it explains why in detail.
https://www.backyardchickens.com/forum/viewtopic.php?id=261208
Silver male X buff female = all white offspring ( assuming female carries two dominant white alleles)
In the above cross, the male will contribute one of his sex linked silver alleles ( incompletely dominant) to everyone of his offspring and the female will only contribute one recessive sex linked gold allele to the son. The sons will be heterozygous silver/gold while the daughters will be hemizygous silver (carry one silver allele). Every offspring will inherit a dominant white allele from the mother therefore any black lacing will be diluted to a white color. White lacing on silver produces a white bird.
Both birds are genetically the same with respect to the other genes that would effect the secondary color pattern: birchen, dark brown, pattern, melanotic and columbian. The birds need to homozygous ( have two identical alleles) for all of the genes to produce the standard sebright lacing.
silver male X buff female = white offspring and silver offspring ( assuming female carries one dominant white allele)
Same as above but the female only gives the dominant white gene to half of the offspring which will produce white offspring . The other half will receive the non-dominant white allele which will produce a silver sebright with black lacing.
The buff bird may also carry autosomal red. This is a catch all term for any red ( any variation of red) color that appears on purebred silver birds. This red is not due to the gold allele. If the buff bird carries autosomal red then some of the prebred silver birds will show some variation of the red on their bodies. Purebred silver means the birds only carry the silver gene. Both the silver and the whites will leak some red/buff color.
The heterozygous silver/gold males will yellow because of the incomplete dominance of the silver allele. This means as the birds get older they will tend to show yellow color in their feathers.
Tim
