What advantage does BrdU (bromodeoxyuridine) have in the study of chromosome structure and recombination?
What will be an ideal response?
Chromatids stained with BrdU in both DNA strands are distinguishable from those with BrdU in only one strand of the double helix.
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Marfan syndrome is the result of inheriting a single allele. Individuals with Marfan syndrome are tall and long-limbed, and have both cardiovascular and eye defects. Marfan syndrome is an example of ________.
A. codominance B. homozygous recessive C. pleiotropy D. incomplete dominance
Changes at the molecular level can turn proto-oncogenes into oncogenes. These changes cause unregulated cell division. Which disease is caused by this transformation?
A. diabetes B. leukemia C. pneumonia D. hemophilia
Ecological efficiency is usually higher in aquatic ecosystems than on land, in part because photosynthetic protists do not make ____, as most land plants do.
A. chlorophyll B. ATP C. lignin D. cellulose E. organic material
Carl Woese proposed the concept of the domain based on differences of which of the following cellular molecules?
A. transfer RNA B. membrane lipids C. ribosomal RNA D. DNA E. proteins