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Thread: Phenotypic Display of Mosaicism

  1. #1 Phenotypic Display of Mosaicism 
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    I was wondering about the different ways in which mosaicism in furred mammals could be displayed in the phenotype, for example how would you see it on the coat colour/type?

    I have read that it is very transient in nature (compared to Chimeras) but - say we are talking about different colour fur displaying - does it appear in only one place; can it recur in the same place after having disappeared the first time; can it recur in a different place entirely, etc?

    I have been searching online but most sites describe the process of it rather than how it is 'seen'. I think I understand how it happens and what it is now - but I am looking for information and examples of how it displays.

    Any comments, examples, links etc would be most helpful.

    Thanks


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  3. #2  
    Forum Cosmic Wizard
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    I really know very little about mosaicism, but I thought about tortoiseshell cats when I read your question and a quick google search brought a few articles related to them and mosaicism.

    First the brief wikipedia page.
    Tortoiseshell cat - Wikipedia, the free encyclopedia

    Then to a catfancier page that talks a bit more about how they appear.
    Tortoiseshell and Tricolour Cats


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  4. #3  
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    Thanks, I will have a look at them as I don't think I have read the cat fancier one, but tortoiseshell cats are more to do with X-activation where one of the X's becomes dominant over the other in certain places - that's why Torties are all female as they have two XX to play with (other genetic quirks like XXY etc, can display Tortie in male cats too).

    And Tortie colouring is also 'permanent' in that they stay Tortie their entire life - Mosaics, I am told, are supposed to fade over time.
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  5. #4  
    Forum Professor Zwolver's Avatar
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    Quote Originally Posted by ApachePatch View Post
    Thanks, I will have a look at them as I don't think I have read the cat fancier one, but tortoiseshell cats are more to do with X-activation where one of the X's becomes dominant over the other in certain places - that's why Torties are all female as they have two XX to play with (other genetic quirks like XXY etc, can display Tortie in male cats too).

    And Tortie colouring is also 'permanent' in that they stay Tortie their entire life - Mosaics, I am told, are supposed to fade over time.
    Fenotypically, when there is no gene superior to the other (Dominant), both are equally prevalent, and in the early stages of conception, the genes to produce a specific tone of hair (or skin or shell) is switched on, or off. As only one gene needs to be on. This switched off gene will continue to be off, even when it splits. So entire area's will appear designated by the moment of specialization of those zones in the body.
    Growing up, i marveled at star-trek's science, and ignored the perfect society. Now, i try to ignore their science, and marvel at the society.

    Imagine, being able to create matter out of thin air, and not coming up with using drones for boarding hostile ships. Or using drones to defend your own ship. Heck, using drones to block energy attacks, counterattack or for surveillance. Unless, of course, they are nano-machines in your blood, which is a billion times more complex..
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  6. #5  
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    Is mosaicism the same then? Are the genes either on or off from the beginning?
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