Basic theory - rwreptiles.nl

							                                    Inheritance
Recessive              In most recessive genes, the heterozygous form appears normal but
                       has been given one gene from either the mother or the father. The
                       Homozygous form shows the mutation.
Incomplete dominance   The incomplete dominance genes come with 2 different mutations.
                       The Heterozygous form shows a mutation which is different from the
                       mutation shown by the Homozygous form. The homozygous
                       condition is often called the superform.

Complete dominance     In the complete dominance genes there is no different looking
                       superform. The superform looks the same as the heterozygous form.

Co-dominance           A mutation can be called co-dominant if if the genes of to appearantly
                       unrelated mutations work together to create a different mutation
                       which couldn't be created without either mutation. Reptile
                       enthousiast often call mutations co-dominant which are in fact
                       (in)complete dominance. Because co-dominance is different from
                       (in)complete dominance this is incorrect. This is an common made
                       mistake.

                                    Conditions
Normal                 The animal doesn't carry genes for the discussed mutation.
Heterozygous           The animal carries just one gene for the mutation which it received
                       either from the father or the mother.

                       In recessive genes the heterozygous condition causes the animal to
                       appear normal but to be considered a gene carrier for the mutation.
                       In incomplete dominance genes this causes the animal to show a
                       mutation which is different than the superform (homozygous).
                       In complete dominance genes this causes the animal to show a
                       mutation which is the same as the superform (homozygous).



Homozygous             The animal carries two of the same genes for the mutation which it
                       received from both the mother(1) as the father (1).

                       In recessive genes the homozygous condition causes the animal to
                       show the mutation.
                       In incomplete dominance genes this causes the animal to show the
                       superform of the mutation which is different from the mutation
                       shown by the heterozygous form.
                       In complete dominance mutations the homozygous condition causes
                       the animal to show the mutation just like the heterozygous form
                       does.
                             Mathematics based on Punnett square
Normal x Normal = Normal
Normal x Heterozygous = 50% Heterozygous, 50% Normal



Normal x Homozygous = 100% Heterozygous



Heterozygous x Heterozygous = 25% Homozygous, 50% Heterozygous, 25% Normal




Heterozygous x Homozygous = 50% Homozygous, 50% Heterozygous
Homozygous x Homozygous = 100% Homozygous
Remark

In recessive genes, het's and normals
look the same, so offspring is referred to
as 50% possible het.




In recessive genes het's and normals
look the same, because 2 out of 3 are
het's offspring is referred to as 66%
possible het.
                                         STEP 1. Morphs you want to ad in the mix
                     Name of the morph
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                                      Step 2. Genetics of the animals you want to breed
Male/Female          Genetics of the animal
The male is




The female is
orphs you want to ad in the mix
                   Inheritance




                                           Step 3. Theoreti

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cs of the animals you want to breed   6
                    Morph             7
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           Step 3. Theoretically outcome per mutation in percentage of the clutch
Mutation
Step 3. Theoretically outcome per mutation in percentage of the clutch
 outcome
inheritance
Recessive
(in)complete dominance
Genetics of the animal
Normal (not heterozygous or homozygous)
Heterozygous
Homozygous
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