Out of curiosity: When is the sex determined?

Discussion in 'Incubating & Hatching Eggs' started by PeppermintHen, Feb 15, 2012.

  1. PeppermintHen

    PeppermintHen Chillin' With My Peeps

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    From sperm to yolk in the whole fertilization process when is the sex of the chick determined? Is it done before the eggs is laid, or when the incubation starts? Thanks -- Yvette
     
  2. ChickenCanoe

    ChickenCanoe Chicken Obsessed

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    In general it is at insemination. When the sperm joins the egg.
     
  3. tls_ranch

    tls_ranch Stares at Chickens

    I believe the sex is determined by the hen with each egg...not the rooster's sperm. Chickens are not like humans where the male XY chromosomes determine the sex of the offspring at fertilization, in birds it's the female that controls sex by the Sex Chromosomes Z-W.

    Trisha
     
    Last edited: Feb 15, 2012
  4. ChickenCanoe

    ChickenCanoe Chicken Obsessed

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    I believe you're right Trisha. Birds system of sex determination -ZW in which it is the females that are heterogametic (ZW), while males are homogametic (ZZ).
    That said, I think it's a done deal once the egg is laid.
     
  5. cashdl

    cashdl Chillin' With My Peeps

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    The sex of the chick is determined when the hen add her genes to it. If she adds the W chromosome it will be a pullet if she ads a Z chromosome it will be a male. To be a male it has to inherite the z chromosome from the hen.

    Lanae
     
  6. srpaint

    srpaint Chillin' With My Peeps

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    Cool info to know!
     
  7. PeppermintHen

    PeppermintHen Chillin' With My Peeps

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    Thanks to all of you, you answered my question.[​IMG]
     

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