If δg = δh - tδs, when is the overall free energy change (δg) in a reaction most likely to be negative (meaning that the reaction is exergonic)?

a. when products have lower potential energy and higher entropy than reactants
b. when products have higher potential energy and lower entropy than reactants
c. when products have lower potential energy and lower entropy than reactants
d. when products have higher potential energy and higher entropy than reactants

In the mouse, gene a allows pigmentation to be deposited in the individual coat hairs; its allele a prevents such deposition of pigment, resulting in an albino. gene b gives agouti (wild-type fur); its allele b gives black fur. what would the expected ratio of the progeny be in a cross of a doubly heterozygous agouti mouse mated with a doubly homozygous recessive white mouse? 1 (agouti) : 1 (black) : 1 (albino) 9 (agouti) : 3 (black) : 4 (albino) 3 (agouti) : 4 (black) : 9 (albino) 1 (agouti) : 1 (black) : 2 (albino) 9 (black) : 27(albino)