Not to get too sidetracked, but the inheritance of the Spider mutation has not been proven to be just "Dominant" or "Co-Dominant" since not enough Het. X Het. breedings have been done / recorded to sort through.

Basically, if there is a Super (homozygous) Spider, which repeatedly throws 100% spider litters when bred to a normal, and appears visually to be just a "regular spider" then this morph will be proven(somewhat!) to be true Dominant inheritance.

If, in het X het breedings, a certain % of the offspring terminate before full term / or are infertile due to being a "Super" or Homozygote, then this is a Co-Dominant means of inheritance.

Also, if a visually different super spider is produced, this would also mean co-dominance.

Thanks, and hope this helps.
Dan

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