RRYY x rryy
(Round Yellow) x (Green wrinkled)
R = Round
r = wrinkled
Y = Yellow
y = green
Mendel’s results: 9 : 3 : 3 :1 ratio in the F2 generation.
C = full color; dominant
to all other alleles
cch= chinchilla; partial defect in pigmentation; dominant to ch and c alleles
ch = Himalayan; color in certain parts of the
body; dominant to
c = albino; no color;
recessive to all other
Full color: CC, Ccch, Cch, or Cc
Chinchilla: cchch, cchcch, or cchc
Himalayan: chc, or chch
Ex. 1 hydrangea flower color of blue to pink depends on the acidity of the soil.
Ex. 2 The artic fox’s coat color depends on the temperature: warm temps produce enzymes that cause a darker coat color. Therefore white in winter to blend in with the snow!
Ex. 3 Human height is influenced by nutrition