Calling all genetics geeks

Discussion in 'General breed discussions & FAQ' started by Poultry Friend, Sep 24, 2012.

  1. c (recessive white)

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  2. s^al (Sex-linked recessive imperfect albinism)

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  3. Either c and/or s^al not working as normal

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  4. Don't know. Not c or s^al

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  5. Something new.

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  6. Don't actually know anything about genetics, but I wanted to vote.

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Multiple votes are allowed.
  1. Poultry Friend

    Poultry Friend Chillin' With My Peeps

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    What color is this? It is recessive, but you can see very faint ghosting on the birds. Some have pale grey lacing or penciling. Some have pale gold and some have both pale grey and pale gold. Their eyes are brown or black.

    These are Javas

    Chick comparision:
    [​IMG]

    The grey colored one grew up to be the hen below

    [​IMG]


    [​IMG]

    [​IMG]


    These are not my birds, but I am trying to help the owner figure out what they are.

    I thought they might be sex-linked recessive incomplete albinism (s^al) but they do not have red eyes, so I doubt it is.

    Any ideas?
     
  2. nicalandia

    nicalandia Overrun With Chickens

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    interesting.... when looking at the grown bird I would have said heterozygous white or homozygous blue(Splash) but the chicks just dont look like white or splash birds... the faint lacing is due to the Power of Pg(pattern gene) and Ml(Melanotic) being almost inmune to dilution on a Extended Black background(E)... again interesting...


    maybe you need to add Opal to the guesstimates...
     
    Last edited: Sep 24, 2012
  3. Poultry Friend

    Poultry Friend Chillin' With My Peeps

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    It cannot be heterozygous white, since it has to be a recessive gene and any recessive gene will not show in the heterozygous state. These 'white' birds were hatched from an all black flock, that is how I know it has to be recessive and only expressed in the homozygous state.

    It also cannot be blue (or splash) since blue is not see in Javas.

    Could you tell me more about Opal. I cannot find any info on this gene at all. What loci is it at? What breeds is it found it? What is it's symbol?
     
  4. Henk69

    Henk69 Chillin' With My Peeps

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    Well, opal is not yet located ;)
    Earlier findings suggested the recessive white locus, but a recent topic on this board contradicted that.
    The difference between opal and sexlinked incomplete albinism (s^al) is that a "grey" roo would always produce "grey" daughters and that a black female can not carry s^al
     
  5. nicalandia

    nicalandia Overrun With Chickens

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    what has changed from the earlier findings, I think sjarvis provided enough documentation and breeding records...
     
  6. Poultry Friend

    Poultry Friend Chillin' With My Peeps

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    I had seen that there was thoughts it could be on the C loci and the most recessive with the symbol cOp. Is this no longer the case? If not, why?
     
  7. nicalandia

    nicalandia Overrun With Chickens

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    well Sjarvis a very meticulous breeder just re confirmed the C allelic school of thought,
    the poster that said it was an allele of dominant white has not given enough proof to change our minds
     
  8. nicalandia

    nicalandia Overrun With Chickens

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    Sjarvis has been working with Opal for years now, and look how his pure Opal chicks look....they look gray at hatch, but then later turn into Opal, the hen you show may very well be Opal




    the faint lacing again is due to Pg Ml on a Extended black background, some of Sjarvis birds seem to also have those genes...

    check it out

     
    Last edited: Sep 25, 2012
  9. Henk69

    Henk69 Chillin' With My Peeps

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  10. nicalandia

    nicalandia Overrun With Chickens

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