Genetics for dummies?!

[Henk69]

Sorry Tim,

Black in dogs is rarely caused by the most recessive agouti mutation a. Only in German Shepherd, hope I spell that correct, and related breeds. In most other dogs black is caused by dominant mutation K at the k-locus. Most mammals have the so called dominant black mutation at the e-locus, the same locus as recessive yellow/red; but not dogs.
Yellow labs are also dominant black underneath. The chocolate gene b is not suppressed by this dominant black, which makes a dog full black (or chocolate or blue).

 

[loverOFchickens]

You guys are getting sidetracked.

 

[loverOFchickens]

Back to chickens??

 

[Krys109uk]

Oh, but it's so interesting.

 

[Henk69]

Examples in other species are very suitable to explain genetics to dummies...

 

[mylittlezoo]

OK, I think I lost you on page 1. This is so confusing...... !!

 

[happytxchick]

Quote:
Agreed...thanks for the crash course! I am inspired to learn more...

 

[Feathered Wings]

Quote:
Genetics are tricky and can be very confuseing, some people work for years creating new colors.
I have from a breeder Lemon Blue oegb and when i breed them i can get up to 4 colors.
Lemon Blue, Brown Red, Blue Splash, Lemon Blue Splash all from the same line.
I'm currently working on my Lemon Blues as the genetics have went to the Brown Red and Blue Splash/Lemon Blue Splash.
I'm not getting as many Lemon Blues as i would like too and way to many Blue Splash.
So I'm useing the Lemon Blue Splash and Brown Reds to bring my Lemon Blues back up to the numbers i prefer.

The genetics of a Crele for example are the crossing of a Barred Rock and a Brown Red.

Talk to breeders like i do about genetics sometimes it's easier to learn from someone that has breed what you are looking for.
Go to the chicken shows and swap meets and strike up a conversation with a breeder i have found they love to talk about their chickens.

 

[tadkerson]

Henk,

The discussion of all the genes involved in making a black dog would be time consuming and confusing. I stand by my explanation as a simple way to explain the possibility.

I did not think it would have helped to get into the other genes that are involved in the switching mechanism associated with the black coat or the variants associated with the MCR1 or extended black gene and the other gene variants involved in coat color in dogs.

Yes I would agree that the K locus (β-defensin 103) and B (Tryp1) locus are also involved in determining coat color in dogs. The tyrosinase gene is also involved in coat color in labs.

I have provided some documentation.

http://jhered.oxfordjournals.org/cgi/reprint/94/1/75

http://www.springerlink.com/content/kr1bj48lv4t2ywdx/

http://www.springerlink.com/content/72vj9fr4nwc362e6/

http://pt.wkhealth.com/pt/re/agen/a...ssS5K1P2QpX95KQn!1864410514!181195629!8091!-1

http://www.springerlink.com/content/7gc8e5tj73f1pt5n/

http://www.genetics.org/cgi/content/abstract/176/3/1679

http://www.sciencemag.org/cgi/content/abstract/318/5855/1418

http://www.sciencemag.org/cgi/content/abstract/323/5919/1339

http://pt.wkhealth.com/pt/re/agen/a...Y2Xznyf2lGTGPGV!-1951856367!181195628!8091!-1

http://jhered.oxfordjournals.org/cgi/content/abstract/esm018v3

http://www.ncbi.nlm.nih.gov/pubmed/...nel.Pubmed_DefaultReportPanel.Pubmed_RVDocSum


Tim

PS This is why I stopped posting at the coop. I get tired of defending my answers.

 

[bantiesrule]

I'm still wondering how you get a lavender or porcelain in the Mille Fleur d'Uccles? Any simple explanations as I also am a "Genetic dummie"? I have also never seen the d'Uccle line in a splash, do they breed that way? After asking this, I thought I'd check out feathersite and there is one on there so I guess that answers that. Here's the link if you want to check it out, I didn't realize there were quite so many colors in the d'Uccle line.

http://www.feathersite.com/Poultry/CGK/Millies/BRKMilleFleur.html