When 2 spotted gerbils are bred together (Spsp x Spsp) 25% of the pups would
be SPSP, however that is a lethal gene combination so those are reabsorbed in
the womb and never born. This just means that theoretically litters from a
pied to pied breeding will always produce 25% less pups but due to odds this
is not always true, I had a nutmeg pied to a nutmeg pied that consistently
gave litters of 7 or 8 which should mean that actually they should have had
11 or 12, of course there is probably someone that did the same thing and is
only getting litters of 4.
Doug
