labs- color genes?

SlimPickens · 05-21-2003, 02:15 PM

My black lab pup came from a litter of blacks and chocs. Was wondering if she is carrying a chocolate gene. Is there a genetic test to find this out? How much money does the test cost? Kind of curious to find out before she's old enough to have pups. Might also be a deciding factor for her stud if I want both colors too.

Mom and dad were blacks, dad carried the choc gene.

thanks!!

Firedog · 05-21-2003, 04:45 PM

All I now is that Chocolate is the most resesive of the three, Black being dominant and Yellow being in the middle. I would guess that with some of Her siblings being Chocolate she will have the gene. Might be able to get Chocolate pups if bred with a chocolate. Now if you do that and get Chocolate pups I might be in the market for one by then. My Chocolate is going to be 12 and even though she gets around the house fine she has probably seen her last trip hunting. :depressed:

Lured In · 05-21-2003, 05:48 PM

Color is a mathmatical calculation. There are a few sites online that can help you figure out what the genetic possibilities with your dog are. You will need to know the the color traits of probably two generations back.

You could have two black (dominant gene) dogs that are bred together and yield a black/brown litter if both parents have the chocolate resessive gene.

steelhead22 · 05-21-2003, 10:59 PM

How 'bout this? Father was a chocolate, mother was a yellow, litter of all black pups?! I can't explain it, if someone can let me know. Well, our pup is 3 now and will have her first litter at the end of June. She was bred with a black that usually produces a couple chocolates. What do you think she'll have? Your guess is as good as mine.

snit · 05-22-2003, 01:36 PM

As mentioned above, it's a matter of doing the math. Check online for "probablity equations", and "genetic dominance". You have to have the pedigrees of both dogs, and then plug them into the supplied equations. My black ***** came from a brown daddy and a yeller' momma too (all black pups) too! My ***** was bred to a yellow stud and she had yellows and blacks. It's not a simple procedure to know what you'll have, it's easier to know what you WON'T have.

Day Late · 05-22-2003, 04:39 PM

Breed her with a chocolate, she'll have 10 pups+/- and I'll bet you'll get some chocolates. All labs are great-some just better than others. My old boy is chocolate, his father was chocolate and his mother was black. Her litter was 1/2 black and 1/2 chocolate. Her father was yellow! Go figure...... and good luck! :grin:

Day Late

bait boy · 05-25-2003, 10:42 PM

Vet-gen has a DNA test that is run on your dog and is relatively simple for proof of what your dog is capable of having. Vet-gen

I did it on my dog and found her to be a BY and that helped immensly when looking for a stud dog and greatly improved our chances at getting a good batch of yellows. Our litter turned out to be 9 pups, 3 yellows and 6 black. we thought that it would be more of 50/50 split but are relatively pleased with the results as I got my yellow boy...

SlimPickens · 05-27-2003, 07:52 AM

Thanks for the help everyone.

I checked into this a little more. Found a good website that explains it all (???). Well, at least it's kind of clear how you get yellows from chocs/blacks.

http://www.labbies.com/genetics.htm

Rueben4life · 06-02-2003, 09:47 AM

<font size="2" face="verdana,arial,helv">My black lab pup came from a litter of blacks and chocs. Was wondering if she is carrying a chocolate gene. Is there a genetic test to find this out? How much money does the test cost? Kind of curious to find out before she's old enough to have pups. Might also be a deciding factor for her stud if I want both colors too.

The answer to your question(s) can be answered using a punnent square.

To figure this out we know that the F1 generation of your pup is BB(black&dominant)X bb(choc*recessive) so the possiblities for offspring are Bb and Bb. The result of Bb is a Gene with both a Dominant and recessive trait meaning that your black pup(Bb) has both a black allele and choc. allele. Since Black is dominant that is the color of your pup.

The question of whether your dog will have choc. puppies depends on the genetic background of the father. Basically it winds down to these scenarios:
if he is Black and Homozygous-Dominant(BB) the litter will be all black
If he is Black and recessive for brown(Bb)the litter will be 75% Black and 25% brown.
If he is Yellow(we know that yellow is homozygous recessive for labs and will be (yy) so the litter will be 50% black and 25% brown and 25% yellow. Breeding with a yellow can give you the wides array of offspring. The percentages won't exactly be 50%-25%-25% it may be 50%black-50%yellow or 50%black-50%brown.
If he is Brown again we know brown to be homozygous recessive (bb) so the offspring could possibly be 50%black and 50% brown. Since I lack the ability to upload something for you to visualy see how this will work out you can email me and I can create a sheet to show you. This is simple Mendelian Genetic theory. Something that we all know a lil' about just not enough of the critical information. The concept is pretty simple, keeping it that way makes it difficult. You can email me at BWrightback87@hotmail.com

Hope this helps calrify your questions!

Brett