Wyandotte Genetics Question! (Need someone who's very familiar with genetics to explain)

Discussion in 'General breed discussions & FAQ' started by ChickenLeg, Mar 9, 2012.

  1. ChickenLeg

    ChickenLeg Chillin' With My Peeps

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    Feb 15, 2012
    I've asked this question in the forums already, but I was wanting an experts advice. If I cross a Golden Laced Wyandotte roo with Silver Laced Wyandotte hens, what will their offspring look like? and please explain why they will look the way they do?
     
  2. Henk69

    Henk69 Chillin' With My Peeps

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    Groesbeek Netherlands
    The pattern is the same in the parents only the groundcolor differs.
    The groundcolor gold/silver is determined by a sexlinked gene S.
    Gold s+ is the wildtype and recessive to silver S.
    Because the mode of inheritance is sexlinked all the female crosslings get the gold gene from their father, and nothing from their mother, so they will be gold.
    All the sons get the gold gene from their father too, but they also get the dominant silver gene from their mother and therefor look (more or less yellowish) silver.
     
  3. pastorwalt

    pastorwalt Chillin' With My Peeps

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    Apr 26, 2011
    I'm not the expert you are waiting for
    but...
    If you are just wondering why all of the females will be gold s+/-
    and the males yellow/golden. S/s+
    It's because Silver (S) and Gold (s+) are sex linked.
    they occur on the Z sex chromosome
    In birds, unlike mammals, females have a Z and a W sex chromosome
    Males have 2 Z's (in Mammals XX=female, XY=male)
    so your hens pass one or the other to each of their chicks

    the chicks which get a Z from your SLW hen will be male
    they will pick up the silver (S) gene on her Z chromosome
    They will get another Z chromosome from the roo with s+
    So they will be S/s+. (one of these could sire both Gold and Silver hens)

    the chicks which get a W from your SLW hen will be female
    They will get their Z chromosome from the roo and with it his "S"gene
    since they will have no gene for Silver they will be Gold

    Walt
     
  4. pastorwalt

    pastorwalt Chillin' With My Peeps

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    Apr 26, 2011
    while I was typing away the real expert answered much more succinctly
     
  5. ChickenLeg

    ChickenLeg Chillin' With My Peeps

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    Feb 15, 2012
    thanks guys, i kinda understand now [​IMG]
     

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