Which is easier to establish in a pure-breeding
population, a dominant or a recessive gene? What will be an ideal response?
Answer: Recessive
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Which of the following is true of both T cells and B cells?
A. They produce effector cells against specific pathogens. B. They are produced from stem cells of the bone marrow. C. They can attack and destroy invading pathogens. D. They have a short life span. E. All of these statements are true.
A layer of lipoprotein and glycoprotein that covers the outer surface of some viruses is the
A. capsid. B. casing. C. envelope. D. membrane. E. viroid.
The ovary in an adult contains
A) seminal vesicles. B) many oocytes in various stages of maturity. C) many sperm in various stages of maturity. D) a number of mature oocytes equal to 100 minus the woman's age.
Which of the following DNA sequences would most likely be recognized by a restriction enzyme? (Note: Only the coding strand is shown.)
A: AGTCGA B: GTCTGA C: TAAGGT D: TCGTGGA E: TAGCTA