In corn the dominant allele P causes purple corn kernels, and the recessive allele p causes white kernels. On a separate chromosome pair is another gene effecting kernel texture. The dominant allele R causes round kernels, and the recessive allele r causes wrinkled kernels. If PpRr plant is crossed to another PpRr plant, what is the expected phenotypic ratio of the F1 plants? �

Select one:
a. 9 white wrinkled : 3 purple wrinkled : 3 white round : 1 purple round
b. 9 purple round : 3 purple wrinkled : 3 white round : 1 white wrinkled
c. All purple round
d. 3 purple round : 1 white wrinkled
e. 3 purple round : 3 purple wrinkled : 1 white round : 1 white wrinkled

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody