in a particular type of cat, coat color follows the dominant/recessive pattern of inheritance. the allele for a brown coat (b) is dominant to the allele for a white coat (b).
a cross between two white-coated cats would result in
a.
white-coated kittens or brown-coated kittens.
b.
white-coated kittens with brown spots.
c.
white-coated kittens only.
d.
brown-coated kittens only.

Lactase is essential for digesting lactose in milk. this enzyme is specific for this sugar. why? molecules and active sites vary in size; only properly sized molecules can fit.there is a precise compatibility between the active site and the lactose molecule.specificity refers to the action of the enzyme, such as hydrolysis, and relatively few molecules can be hydrolyzed.reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules.