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Cards In This Set
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Chromosome structure can be altered by a _____ .
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A. deletion
b. duplication c. inversion d. translocation e. all of the above |
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Nondisjuction can be caused by _____ .
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Failure of chromosomes to separate during meiosis
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A gamete affected by nondisjuction would have _____ .
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A. a change from the normal chromosome number
b. one extra or one missing chromosome c. the potential for a genetic disorder d. all of the above |
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Amniocentesis involves sampling
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The fetal cells floating in the amniotic fluid
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The condition occurring when an organism has a 2n + 1 chromosome composition is known as
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Trisomy
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In Down syndrome
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As the age of the mother increases, the chance of the defect occurring in unborn children increases
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The sex chromosome composition of a person with Turner syndrome is
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XO
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Bacteriophages are
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Viruses
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The significance of the experiments in which 32P and 35S were used is that
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It demonstrated that radioactively labeled bacteriophages transfer their DNA but not their protein coats to their host bacteria
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Sulfur is
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Found in proteins but not nucleic acids
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Hich is not a nucleotide base in DNA?
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A. adenine
b. guanine c. uracil d. thymine e. cytosine |
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James Watson and Francis Crick
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A. established the double-stranded nature of DNA.
b. established the principle of base pairing. c. explained how DNA's structure permitted it to be replicated. d. proposed the concept of the double-helix. e. all of these |
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What are the base-pairing rules for DNA?
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A-T, G-C
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In the pairing of two nucleotides within the double helix
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A. hydrogen bonds are used.
b. adenine and thymine bind together. c. purines bind with pyrimidines. d. double-ring nitrogenous bases connect to single-ring bases. e. all of these |
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From X-ray diffraction data, which of the following was determined about DNA?
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A. The molecule had uniform diameter.
b. The molecule was long and narrow. c. Part of the molecule repeated itself often. d. The shape of the molecule could be spiral. e. all of these |
