Amniocentesis is a procedure that is normally used
A. to reduce the risk of genetic disease.
B. for gene therapy.
C. to change the sex of the fetus.
D. for diagnosis of genetic disorders.
E. for nourishing the fetus.
D. for diagnosis of genetic disorders.
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Which of the following is a part of the first law of thermodynamics?
a. Energy can be neither created nor destroyed. b. Energy cannot be transformed. c. The entropy of the universe is constant. d. The entropy of the universe is decreasing. e. Potential energy is the energy of motion.
Normal fruit flies have red eyes. Flies with mutations that block the function of the X-linked white gene have white eyes. The wild-type allele is completely dominant to mutant alleles. A cross between a white-eyed female fruit fly and a red-eyed male would generate which of the following types of progeny?
A) red-eyed females and white-eyed males B) white-eyed females and red-eyed males C) all red-eyed females and a 50:50 mixture of white-eyed and red-eyed males D) all red-eyed males and a 50:50 mixture of white-eyed and red-eyed females E) The result cannot be predicted because it depends on whether the female is homozygous or heterozygous.
The thymus plays a role in:
a. glucose metabolism. b. immune function. c. skeletal growth. d. muscular growth. e. sleep-wake cycles
The normal habitat for Vibrio cholerae is (humans/animals/water).
Fill in the blank(s) with the appropriate word(s).