Q1. A patient has an 80 percent blockage of his left anterior descending coronary artery. Illustrate what occurs in terms of myocardial oxygen supply and demand if his sympathetic nervous system is stimulated.

Q2. When a homozygous black, solid-hoofed male pig was mated to a female from pure breed of red, cloven-hoofed pigs and the F1 progeny were backcrossed to the female breed, the results were 8 black, solid -hoofed, 11 black, cloven-hoofed, 14 red, cloven-hoofed and 10 red, solid-hoofed. What is the genetic basis of two pairs of alleles?