In a hypothetical embryo, a high concentration of a morphogen called morpho is needed to activate gene P; gene Q is active at or above medium concentrations of morpho; and gene R is expressed so long as any quantity of morpho is present. A different morphogen, called phogen, activates gene S and inactivates gene Q when at medium to high concentrations. If morpho is produced in the anterior end of the embryo and phogen is produced in the posterior end of this embryo, which genes will be expressed in the middle region of the embryo

Suppose that on a small island off the coast of scotland, 32 percent of the population has blue eyes, which means that these individuals must be homozygous for the blue eye color gene (bb). the only other eye color found on the island is brown, and individuals that are homozygous for the brown eye color gene (bb) or heterozygous (bb) will have brown eyes because brown is the dominant gene. assume this population is in hardy-weinberg equilibrium. if 100 babies are born next year, how many of these would you expect to have brown eyes and be heterozygous? a. 58 b. 49 c. 29 d. 43

Which of the following is true of metabolism in its entirety in all organisms? a) metabolism depends on a constant supply of energy from food. b) metabolism uses all of an organism's resources. c) metabolism consists of all the energy transformation reactions in an organism. d) metabolism manages the increase of entropy in an organism.

Abacteriophage typically attaches to the bacterium and then