You study a population of lizards with purple-spotted skin. No
matter how hard you try you cannot recover true-breeding
purple-spotted lizards. When you mate two purple-spotted lizards
the progeny segregate 2 purple-spotted to 1 solid green. Solid
green crossed to solid green lizards produces all solid green
individuals.
a) What type of genetic control can explain these
observations?
b) What cross or crosses would you make to support your gene
model? What results are required to support your model? To disprove
your gene model?





