Mrs. Bland is type “A” and Mr. Bland is type “O.” They have three children named Tony, Toni, and Tone. Toni is type “O,” Tony is type “A,” and Tone is type “AB.” Based on this information:
a. Mr. Bland must have the genotype
b. Mrs. Bland must have the genotype because has blood type
c. Tone cannot be the child of these parents because neither parent has the allele .

a. Mr. Bland must have the genotype AO

b. Mrs. Bland must have the genotype AO because Tony has blood type A

c. Tone cannot be the child of these parents because neither parent has the allele B.

the solute can move "downhill," from regions of higher to lower concentration, relying on the specificity of the protein carrier to pass through the membrane. this process is called passive transport or facilitated diffusion, and does not require energy.