In guinea pigs, the allele for short hair is dominant. What genotype would a heterozygous short-haired guinea pig have?
What genotype would a pure breeding (HOMO) short-haired guinea pig have?
What genotype would a long-haired guinea pig have?

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.