How might it happen that a recessive trait may have a greater total number than its dominant counterpart?

How does the author's purpose in this passage differ from an author writing about her personal struggle living with asthma?

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

Restriction enzymes are used in making recombinant dna. describe the role restriction enzymes perform when constructing recombinant dna.