Sickle-cell trait occurs in individuals heterozygous for the autosomal-recessive gene. What is the likelihood that a person who has two parents with sickle-cell trait will have the disorder?
A) 100% (certain)
B) 0% (impossible)
C) 50%
D) 25%
E) not enough information given to answer the question
Answer: D) 25%
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Because of its antiparallel nature, DNA is often referred to as a ________.
Fill in the blank(s) with the appropriate word(s).
Which type of swab is not suitable for the collection of a viral specimen as a result of its ability to interfere with certain tests?
a. Dacron b. Calcium alginate c. Cotton d. Rayon
Which of the following is incorrectly paired?
a. lumpectomy—removal of metastasized cells b. radiation therapy—ionizing radiation that kills cells c. chemotherapy—drugs that often target processes associated with cell growth d. mastectomy—surgery that results in removal of the entire breast
The channel between the bladder and the body surface is the _____.
A. renal medulla B. fallopian tube C. urethra D. ureter E. epididymis