Genetics for dummies?!

[Sonoran Silkies]

You can't--the girls you have now carry the recessive trait. To create a sex-link they must carry a dominant trait.

For example, red sex-link females' mother were silver (S/-), back sex-link females' mother were barred (B/-). However, the red sex-link females are gold (s/-) and the blacks are not-barred (b/-)

 

[Krys109uk]

How about using skin/leg colour? Using a silkie male with the black sex link females would give sex linked offspring.

 

[loverOFchickens]

Just an interesting note on chromosomes.
The hen determines the sex of the babes and the male has more sex chromosomes ( the ones that control sex differences in feathers and stuff as well as the sex link thing)

I realize this is off topic but I thought the hen thing was interesting!

 

[Sonoran Silkies]

Yes, in birds, unlike mammals, the female determines the gender. So, fertilized or not, one could say eggs are either feminine or masculine.

 

[write2caroline]

Not to pop your bubble or anything but
Most Genetics theory was based on bad info skewed to make it work. Like the stuff they taught in Biology classes and are still teaching for basic concept understanding of genetics. A randomly rolled dice is more predictable.

Case in point: Take a yellow lab with a long lineage of yellows and chocolates but no black labs and breed it with a male chocolate with all chocolates for 7 or so generations and what do you get? Hmmm... wanna guess? 15 Black lab puppies... We thought - (my friend the Biology Teacher and I ) we expected yellow and chocolate lab puppies. They were beautiful but we were dumbfounded!

It is hard to breed any kind of animal and get exactly the color that you want - sometimes they have these sneakly little genes that come out to play when you least expect it, unless you have been really really careful with the breeding stock. And papers - do they paper chickens? Are not always proof either.

Either way - enjoy the experiement - that is half the fun of raising animals for show.

Cal
Jax FL

 

[Henk69]

Quote:
When you cross a yellow with a chocolate dog you will get black dogs, if your yellow dog is not chocolate underneath!
The yellow covers black or chocolate or blue or merle and everything else that is based on the "black" pigment eumelanin.

http://kippenjungle.nl/kruisingHond2.html?mgt=E:e/e,K:K/K&fgt=B:b/b,K:K/K

 

[Sonoran Silkies]

Quote:
Finally got time to read through it. VERY nice!

 

[Sonoran Silkies]

Quote:
There is a very large amount of well documented genetic research on poultry. Some of the newer research has altered the findings of older research, and certainly there is still a lot that is not researched and documented. But most of what is being discussed here is dealing with well known and well researched information.

 

[Krys109uk]

most of what is being discussed here is dealing with well known and well researched information.

And as Henk explained, the black puppies from yellow X chocolate, would have been predictable had the breeder known the way the specific genes worked.
Rather like breeding a lavender chicken with a red & getting black offspring.
My children did an experiment with their mice & bred ginger with albino. All of the offspring were wild colour. We assumed ginger & albino might be seperate recessive alleles.​

 

[tadkerson]

Quote:
It is possible to get black dogs from yellow lab and chocolate lab cross.
The pups would be heterozygous at the agouti ( A^S/ a^y) locus and heterozygous at the MCR1 locus. The yellow lab is homozygous at the agouti locus for black and the chocolate is homozygous at the MCR1 locus this would produce all black pups. MCR1 locus is the extended black locus in chickens. Chickens do not have an agouti locus.

By the way, I am a retired biology teacher.

Tim