The genotype of a particular pea plant is TtYy, corresponding to a phenotype of tall and yellow. How many different types of gametes are expected to be produced by this individual?
A) 1
B) 2
C) 4
D) 5
E) 8
C) 4
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What is tolerance, and why must the adaptive immune system exhibit tolerance?
What will be an ideal response?
What is the term for a short section of an underground stem that is encased by overlapping layers of thickened, modified leaves (scales)?
a. corms b. tubers c. bulbs d. stolons e. rhizomes
Water molecules are attracted to one another by _____
A) nonpolar covalent bonds B) ionic bonds C) hydrogen bonds D) hydrophobic interactions
An accident victim receives a blood transfusion. Shortly thereafter, he begins to have difficulty breathing, develops a fever, and experiences nausea and vomiting. Which of the following is the most likely interpretation of these events?
A. the blood transfusion was mismatched. B. the blood transfusion contained pyrogens. C. the recipient had previously been exposed to foreign blood group antigens. D. the blood transfusion was mismatched and contained pyrogens. E. the blood transfusion was mismatched and the recipient had previously been exposed to the foreign blood group antigens.