Q4.5. A scientist came across two populations of beetle species, each pure-breeding. One population was all red in color; the other was all black. The scientist mated one red beetle with one black beetle, and the offspring were all black. What is the dominance relationship between the two alleles

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.