Which of the following statements is true? a.)tt and tt plants have the same phenotype. b.)a person with type o blood has two recessive genes. c.)intelligence is controlled by a single gene. d.)in codominance, both genes are recessive.

The correct answer is option B, that is, a person with type O blood has two recessive genes.  

Explanation:

This is the right answer because:

c'mon buddy, I know, you are on odys.seyware. So yeah, you just need the answer.

currents is the correct answer.

b. read the phase at the intersection of any given temperature and pressure.