Phenylketonuria is the most commonly inherited genetic disorder that affects nervous system development. It occurs in 1 out of every 10,000 births in the United States and Europe. How would you design a study to determine if phenylketonuria is an
autosomal dominant or autosomal recessive disorder? How would you be able to determine if it is dominant or recessive?
What will be an ideal response?
The study would analyze the inheritance patterns of a family through many generations, using a pedigree. If the disorder is dominant, affected children usually have an affected parent, and two unaffected parents will not have affected children. If the disorder is recessive, most affected children have unaffected parents, and two affected parents will always have affected children.
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Bacteria do not have organelles. How are they able to carry out photosynthesis?
A) They are parasites of plants that do have organelles. B) They interact in a symbiotic relationship with eukaryotic plants. C) They use their cell membrane to carry out photosynthesis. D) DNA in the nucleoid captures solar energy. E) 70S ribosomes function as photosystems.
Antimicrobials may produce
A. allergic reactions. B. toxic effects. C. suppression of normal microbiota. D. All of the choices are correct
Contrast Mendel's model of heredity with the blending model. Which one is a better description of the way traits are passed from one generation to the next?
What will be an ideal response?
Which of the following would be most appropriate for removal of bacteria and some viruses from a liquid?
A. N95 filter B. Depth filter (diatomaceous earth) C. Membrane filter (< 0.1?m) D. HEPA filter