In peas, the allele for round seeds (r) is dominant to the allele for wrinkled seeds (r). what would be the genotype and phenotype ratios of offspring from a cross between rr and rr individuals? see section 14.2 (page 293) .

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.