SUMMARY
In order to understand Non-Mendelian genetics you
first should know a little about Mendelian genetics. Mendelian genetics
is about determining the probability of traits surfacing by simple dominant-recessive
relationships. Confusing? Here is a good example. Let's say there are two
frogs, one is green and one is light green. Green is represented by a G,
light green by a g. Also it is known that green is dominate to light green.
Therefore if the progeny of a green frog (Gg) and a light-green frog (gg)
are Gg, the frog is green, but if it is gg it is light-green. That is Mendelian
genetics. Non-Mendelian genetics, however, occurs much more often and includes
all the exceptions to mendelian inheritance. It is everything Mendelian
genetics is not. The reason it occurs more often is that it is not quite
as straight forward and accounts for mutations and strange types of inheritance.