College of Cat Genetics: Seminar 1
by Patricia Turner


Solutions

    1. What is meant by the genotype of a cat and how can this differ from its phenotype?

      Answer:  The genotype of the cat is its recipe or coded instructions for its voice, temperament, colour, conformation and all other characteristics.  The phenotype of the cat is the total of characteristics that may be seen, smelt, heard or otherwise identified by the senses.  Thus, a colour genotype is the complex of colour genes carried on the the chromosomes of a cat and the colour phenotype is the visible colour of the cat.

    2.  
    3. If a Blue cat is mated to a homozygous Black cat, will the kittens be all black, or 50% black and 50% blue?

      Answer:  If a Blue cat is mated to a homozygous Black cat, all the kittens will be Black.

    4.  
    5. What colour gene (present in either a double or a single dose) do the following cats have in common:

    6. Brown Burmese; Seal Point Siamese; Brown Tabby; Chinchilla?

      Answer:  The colour gene common to the Brown Burmese, Seal Point Siamese, Brown Tabby and Chinchilla is Black, 
      i.e. the Black cat with two genes for Burmese dilution becomes the Brown Burmese; 
      the Black cat with two genes for Siamese dilution becomes the Seal Point Siamese; 
      the Black cat with  one or two genes for agouti becomes the Brown Tabby and
      the Black cat with one or two genes for melanin inhibitor and one or two genes for agouti becomes the Chinchilla.