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#627153 - 09/02/08 09:37 PM Random mosaic genetics question
7glider7
Unregistered


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!


Edited by 7glider7 (09/02/08 09:38 PM)

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#627166 - 09/02/08 09:54 PM Re: Random mosaic genetics question [Re: ]
BeckiT Offline
Glideritis Anonymous

Registered: 09/29/06
Posts: 16083
Loc: 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
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#627170 - 09/02/08 09:58 PM Re: Random mosaic genetics question [Re: BeckiT]
Lynsie Offline
Serious Glideritis

Registered: 02/07/05
Posts: 8329
Loc: 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.
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LuckyYou Gliders


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#627182 - 09/02/08 10:15 PM Re: Random mosaic genetics question [Re: Lynsie]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: Mesa, AZ
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.
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#627221 - 09/02/08 10:57 PM Re: Random mosaic genetics question [Re: konotashi]
7glider7
Unregistered


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).


Edited by 7glider7 (09/02/08 10:58 PM)

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#627257 - 09/02/08 11:26 PM Re: Random mosaic genetics question [Re: ]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: 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.)
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#627268 - 09/02/08 11:35 PM Re: Random mosaic genetics question [Re: konotashi]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: 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.


Edited by konotashi (09/02/08 11:35 PM)
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#627283 - 09/02/08 11:48 PM Re: Random mosaic genetics question [Re: konotashi]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: 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
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~Marissa~

How-to Critter Creations

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#627284 - 09/02/08 11:49 PM Re: Random mosaic genetics question [Re: konotashi]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: Mesa, AZ
Just copy it and put it in the address bar.
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~Marissa~

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#627316 - 09/03/08 12:21 AM Re: Random mosaic genetics question [Re: konotashi]
7glider7
Unregistered


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.

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#627417 - 09/03/08 08:07 AM Re: Random mosaic genetics question [Re: ]
tigiris1721
Unregistered


Great job on the punnent square!!!! agree

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#627821 - 09/03/08 08:35 PM Re: Random mosaic genetics question [Re: ]
Srlb Offline
Glideritis Anonymous

Registered: 10/30/03
Posts: 16758
Loc: 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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Critter Love
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If you want to know what a person is like, watch how he treats others.

You'll never know what the outcome is if you don't step up and try.


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#627839 - 09/03/08 08:45 PM Re: Random mosaic genetics question [Re: Srlb]
7glider7
Unregistered


Thimble is a cutie mlove standard or not!

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#628173 - 09/04/08 11:17 AM Re: Random mosaic genetics question [Re: konotashi]
DewDropPony
Unregistered


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?

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#628390 - 09/04/08 05:49 PM Re: Random mosaic genetics question [Re: ]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: 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.
_________________________
~Marissa~

How-to Critter Creations

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


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.

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#628491 - 09/04/08 08:12 PM Re: Random mosaic genetics question [Re: ]
konotashi Offline
Glider Addict

Registered: 08/17/07
Posts: 4061
Loc: 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
_________________________
~Marissa~

How-to Critter Creations

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


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

::blushes::

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