Mendel was the first scientist to describe the concept of diploidy–the idea that organisms like pea plants and humans possess two complete sets of genetic material. Summarize Mendel's observations and the reasoning that led him to this conclusion
What will be an ideal response?
The F1 and F2 phenotypic ratios that Mendel observed in different crosses led him to conjecture that each parent contributes one version of a "unit factor" for each trait during reproduction. Each individual thus possesses two such factors (diploidy), and it is combinations of unit factors that constitute the genotype.
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In Hershey and Chase’s experiment, why would it not have been suitable to use radioactive nitrogen to label DNA?
What will be an ideal response?
In agarose gel electrophoresis, DNA is visualized by ____
a. staining the gel with an agarose-binding dye so the gel, but not the DNA bands, fluoresces under UV light b. staining the DNA with a DNA-binging dye that fluoresces under natural light c. staining the DNA with X-gal so that the DNA bands appear blue d. staining the gel with a DNA-binding dye that fluoresces under UV light e. staining the gel with a DNA-binding dye that fluoresces under natural light
The time interval used to measure the absolute age of rocks by radiometric dating is called the ____
a. radioisotope unit b. radiometric unit c. radiometric life d. radioisotope life e. half-life
Which category of organic macromolecule allows myelinated sheaths to act as electrical insulators?
a. proteins b. carbohydrates c. lipids d. RNA e. DNA