Frankenstein Exotics

The Genetics Lab

Simple Recessives 

Het. or Heterozygous-is an animal carrying any recessive trait but it appears normal.

Homozygous-is an animal carrying two copies for any recessive trait. This animal will display the trait for example an Orange Ghost. Each box represents one gene carried by each parent. Inside boxes represent individual offspring and possible outcome of breeding.

                                     Heterozygous to Normal

                            NN=Normal    NA=Heterozygous

                                       Breeding Outcome

                        50% Normals  50% Heterozygous

                          Homozygous X Normal

         ND= Heterozygous  DD=Homozygous NN= Normal

                               Breeding Outcome

                                       100% Heterozygous

                  Homozygous X Heterozygous Punnet

           OO=Homozygous NO=Heterozygous NN=Normal

                                Breeding Outcome

                       50% Heterozygous 50% Homozygous

Dominant is a gene that is passed onto 50% or more of the offspring during the first breeding. Unlike recessive which do not display the phenotype dominants do. The Spider Ball Python is an example of a dominant trait. Don't get this trait confused with Co-dominant which has a super form.  

                            Dominant X Normal

                       NN=Normal    NA=Dominant

                                        Breeding Outcome

            50% Normal  50% Dominant displaying the phenotype