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13 Cards in this Set
- Front
- Back
Red-green color blindness is a sex-linked recessive trait in humans. Two people with normal color vision have a color-blind son. What are the genotypes of the parents?
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Duchene muscular dystrophy is a serious condition caused by a recessive allele of a gene on the human X chromosome. The patients have muscles that weaken over time because they have absent or decreased dystrophin, a muscle protein. They rarely live past their twenties. How likely is it for a woman to have this condition?
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The following question refer to the pedigree chart in the figure below for a family, some of whose members exhibit the dominant trait, W. Affected individuals are indicated by a dark square or circle.
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In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made use of which of the following facts?
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For a science fair project, two students decided to repeat the Hershey and Chase experiment, with modifications. They decided to label the nitrogen of the DNA, rather than the phosphate. They reasoned that each nucleotide has only one phosphate and two to five nitrogen's. Thus, labeling the nitrogen's would provide a stronger signal than labeling the phosphates. Why won't this experiment work?
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For the Meselson-Stahl experiment shown in Figure 15.5, what would be the composition of the DNA after three generations?
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Semiconservative replication involved a template. What is the template?
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Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell replicates once in the presence of this radioactive base?
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E. coli cells grown on 15N medium are transferred to 14N medium and allowed to grow for two more generations (two rounds of DNA replication). DNA extracted from these cells is centrifuged. What density distribution of DNA would you expect in this experiment?
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After allowing phages grown with bacteria in a medium that contained 32P and 35S, Hershey and Chase used a centrifuge to separate the phage ghosts from the infected cell. They then examined the infected cells and found that they contained _____, which demonstrated that _____ is the phage's genetic material.
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The radioactive isotope 32P labels the T2 phage's:
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Which of these tubes has one strand of radioactive DNA and one strand of normal DNA in the double helix molecule?
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Semiconservative replication involves a template. What is the template?
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