There are nine coat colors known in foxes. If a red

Question

fox were crossed with a double-black fox, all the
hybrids would be red above and black below in a
pattern known as blended cross. If two blended
crosses were mated, the F2 ratio would be as
follows: 1 red, 2 smoky red, 2 cross red, 4 blended
cross, 1 standard silver, 2 substandard silver, 1
Alaskan silver, 2 sub-Alaskan silver, and 1 double
black.
(a) Using the letters A/a and B/b to serve as the
genes for these animals, develop a genotype
for each variety listed.
(b) Two crosses will produce all blended-cross
offspring. One is used above (red fox x double
black); what is the other?
(c) List the genotype and phenotype of all the
pure-breeding foxes.
(d) Give the genotypic and phenotypic ratio of a
cross between two substandard silvers.
(e) Give the genotype and phenotype of the
offspring produced in a cross of a sub-Alaskan
silver and a cross red. What will be an ideal response?

Answer 1