A cross of two Kerry horses always produces Kerry. A cross of a Kerry with a Dexter produces 1/2 ...

A cross of two Kerry horses always produces Kerry.
  A cross of a Kerry with a Dexter produces 1/2 and
  1/2. Crosses of two Dexters produce two Dexters for
  every Kerry. Explain. What will be an ideal response?
 
 

Question 2

In rabbits, there are four alleles at the c locus.
  Arranged in dominance sequence they are:C
   (agouti), cch(chinchilla), ch(Himalayan), and c
  (albino)
  (a) Is it possible to cross two agouti rabbits and
  produce both chinchilla and Himalayan
  offspring?
  (b) Is it possible to cross two chinchillas and
  produce 1/2 chinchilla and 1/2 Himalayan? What will be an ideal response?