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Random mosaic genetics question #627153
09/02/08 10:37 PM
09/02/08 10:37 PM

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7glider7
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OK, I was reading the other post about mosaics and sterility, and now I was hoping someone could clarify the mode of inheritance for mosaic for me.

People are saying that mosaics are dominant (or I have also seen it listed as codominant), but then I saw people posting that from a mosaic x classic gray cross, the babies could be standard gray.

Did I misread this or is this correct? Are all the babies from a mosaic x classic gray pairing ALWAYS mosaic, or can they also be standard?

Just trying to figure out for myself if it is dominant or codominant...not that I am planning on breeding but I am a genetics geek grin If mosaic was codominant, then methinks that all the babies from whatever pairing you do would have mosaic coloring, but if mosaic was simply autosomal dominant, than this could explain standard babies showing up from such a pairing. Thanks in advance for the info, breeders!

Last edited by 7glider7; 09/02/08 10:38 PM.
Re: Random mosaic genetics question [Re: ] #627166
09/02/08 10:54 PM
09/02/08 10:54 PM
Joined: Sep 2006
Posts: 16,087
Manitowoc, WI
BeckiT Offline
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BeckiT  Offline
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Manitowoc, WI
they can be gray (or whatever non-mo color) or mosaic.. My sisters are from a Champagne Silver Tail mom and a mosaic dad. Camilla is a ringtail mosaic, her sister Celine is a gray

Re: Random mosaic genetics question [Re: BeckiT] #627170
09/02/08 10:58 PM
09/02/08 10:58 PM
Joined: Feb 2005
Posts: 8,366
Quincy, IL 62305
Lynsie Offline
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Lynsie  Offline
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Joined: Feb 2005
Posts: 8,366
Quincy, IL 62305
The mosaic gene works like the wfb gene. You can pair it with any color but most of the time you will still only get mosaics 50% of the time.

Re: Random mosaic genetics question [Re: Lynsie] #627182
09/02/08 11:15 PM
09/02/08 11:15 PM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
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Co-dominance means that one gene isn't totally dominant, nor is it totally recessive. There is (I think) a 50/50 chance of getting either a mo or a normal.
That's why you never see any mo hets - because it HAS to have the shown trait (phenotype) to have the gene, since standard doesn't cover it up.

Re: Random mosaic genetics question [Re: konotashi] #627221
09/02/08 11:57 PM
09/02/08 11:57 PM

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7glider7
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Thanks Becki and Lynsie, that makes sense.

Actually Marissa, you would have to have mosaic hets if I'm not mistaken...otherwise there would be no way that a mosaic could have a standard gray baby. By mosaic het I mean in the sense that the mosaic glider is heterozygous, not that it is a "carrier." Because any glider "carrying" the dominant mosaic allele would, in fact, be a mosaic...so it's not an allele that could be masked.

The mosaic gene has been determined to be a dominant gene, meaning that any glider that carries it is mosaic. Let's say that the mosaic allele is M. Anytime a glider is mosaic an M has to be present, so the mosaic glider could be MM or Mm.

In order for you to get standard gray babies (mm) from a mosaic cross, the mosaic glider would have to be heterozygous, or carrying an m. This way if a mosaic (Mm) was paired with a standard gray (mm), about 50% of your offspring would be mosaic, and 50% would be standard gray, like what Lynsie just described.

That is assuming they are autosomal...and it sounds like mosaic might be codominant...which would make it a little different than I typed it above. Blood typing is a codominant system...probably the most commonly used example.

(Correct me if I'm wrong on all this as I'm going on genetics and have not bred any of these cuties myself).

Last edited by 7glider7; 09/02/08 11:58 PM.
Re: Random mosaic genetics question [Re: ] #627257
09/03/08 12:26 AM
09/03/08 12:26 AM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
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konotashi  Offline
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Mesa, AZ
That would be right, but there's a bunch of different Punnet squares used for different types of genes. The Punnet square you're describing is for recessive and dominant genes only. I'm making a diagram right now to make it a bit easier. (since words can make it hard to describe some stuff.)

Re: Random mosaic genetics question [Re: konotashi] #627268
09/03/08 12:35 AM
09/03/08 12:35 AM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
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konotashi  Offline
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Posts: 4,061
Mesa, AZ
Hold on. I'm making a codominance Punnet square, but then ALL of the babies should show the mosaic phenotype.... Hold on, I gotta figure this out!

Wait, I think I know what I'm doing now. Gimme a sec.

Last edited by konotashi; 09/03/08 12:35 AM.
Re: Random mosaic genetics question [Re: konotashi] #627283
09/03/08 12:48 AM
09/03/08 12:48 AM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
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konotashi  Offline
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Posts: 4,061
Mesa, AZ
Here's the chart I made.

It shows where I messed up and everything....
But I corrected myself!

http://i254.photobucket.com/albums/hh100/Maki_Maki/Tiny%20Crap/Suggiegenentics.jpg

Re: Random mosaic genetics question [Re: konotashi] #627284
09/03/08 12:49 AM
09/03/08 12:49 AM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
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konotashi  Offline
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Mesa, AZ
Just copy it and put it in the address bar.

Re: Random mosaic genetics question [Re: konotashi] #627316
09/03/08 01:21 AM
09/03/08 01:21 AM

7
7glider7
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7glider7
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Wow LOL you just gave yourself a crazy homework assignment with all those Punnett squares...but yup, you have the codominant thing exactly right smile Guess that clears it up for both of us, and anyone else who is curious enough to read the thread...great diagram for those who are not genetics geeks, hehe.

Re: Random mosaic genetics question [Re: ] #627417
09/03/08 09:07 AM
09/03/08 09:07 AM

T
tigiris1721
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Great job on the punnent square!!!! agree

Re: Random mosaic genetics question [Re: ] #627821
09/03/08 09:35 PM
09/03/08 09:35 PM
Joined: Oct 2003
Posts: 16,799
St. Johns, Florida
Srlb Offline
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Srlb  Offline
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Joined: Oct 2003
Posts: 16,799
St. Johns, Florida
Yepper, they sure can be standard grey...even when Mom is a Mosaic and Dad is a WFB...

That is how Thimble came about!!

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Re: Random mosaic genetics question [Re: Srlb] #627839
09/03/08 09:45 PM
09/03/08 09:45 PM

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7glider7
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Thimble is a cutie mlove standard or not!

Re: Random mosaic genetics question [Re: konotashi] #628173
09/04/08 12:17 PM
09/04/08 12:17 PM

D
DewDropPony
Unregistered
DewDropPony
Unregistered
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Originally Posted By: konotashi
Here's the chart I made.

It shows where I messed up and everything....
But I corrected myself!

http://i254.photobucket.com/albums/hh100/Maki_Maki/Tiny%20Crap/Suggiegenentics.jpg


konotashi, can I use this diagram for my glider website?

Re: Random mosaic genetics question [Re: ] #628390
09/04/08 06:49 PM
09/04/08 06:49 PM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
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konotashi  Offline
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Joined: Aug 2007
Posts: 4,061
Mesa, AZ
Originally Posted By: DewDropPony
Originally Posted By: konotashi
Here's the chart I made.

It shows where I messed up and everything....
But I corrected myself!

http://i254.photobucket.com/albums/hh100/Maki_Maki/Tiny%20Crap/Suggiegenentics.jpg


konotashi, can I use this diagram for my glider website?


If you want to. smile
I'll be happy to crop out the other two charts if you don't want them on there.

Re: Random mosaic genetics question [Re: konotashi] #628488
09/04/08 09:06 PM
09/04/08 09:06 PM

D
DewDropPony
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DewDropPony
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That would be great! You can see my website. It's in my sig, if you didn't find it already.

I would put it in my breeding section for educational purposes only. I can also list your user name next to it, or real name, or keep you anonymous if you wish.

Re: Random mosaic genetics question [Re: ] #628491
09/04/08 09:12 PM
09/04/08 09:12 PM
Joined: Aug 2007
Posts: 4,061
Mesa, AZ
konotashi Offline
Glider Addict
konotashi  Offline
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Joined: Aug 2007
Posts: 4,061
Mesa, AZ
Here it is. smile
I'm about to post a thread with a list of leucistic genetic possibilities.

http://i254.photobucket.com/albums/hh100/Maki_Maki/Just%20Random%20Stuff/Mosaicgenetics.jpg

Re: Random mosaic genetics question [Re: konotashi] #628495
09/04/08 09:14 PM
09/04/08 09:14 PM

D
DewDropPony
Unregistered
DewDropPony
Unregistered
D



I saw. I was about to ask for that also.

::blushes::


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