In rabbits, there are four alleles at the c locus. Arranged in dominance sequence they are:C
(agouti), cch(chinchilla), ch(Himalayan), and c (albino)
(a) Is it possible to cross two agouti rabbits and produce both chinchilla and Himalayan
offspring?
(b) Is it possible to cross two chinchillas and produce 1/2 chinchilla and 1/2 Himalayan? What will be an ideal response?
(a) no
(b) not likely but possible--would expect a 3:1
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Which of the following is true?
A) Mutations that inactivate tumor suppressor genes are important in cancer. B) Cancer is a single disease with one underlying molecular cause. C) Uncontrolled cell growth alone is sufficient for the development of cancers. D) Cancer is a single disease resulting from a common set of mutations.
An oncogene form of Ras would have ___________
A. decreased GTPase activity B. an inability to bind GTP C. increased susceptibility to growth factors D. inability to bind Raf-1
What kind of molecular information is commonly used to study phylogeny among ORGANISMS that diverged from a common ancestor relatively long ago?
A. Whole genomes because they are easy to obtain. B. Segments of cellular membrane proteins because the proteins, coded by DNA, are found in all living organisms. C. The mitochondrial genome because it easily incurs neutral mutations. D. Small ribosomal subunit (SSU) RNA because it is found in the genomes of all living organisms. E. DNA sequences within introns because their sequences change rapidly over evolutionary time.
The source of dioxin as a chemical pollutant is ________
A) wood preservative B) petroleum products C) pulp and paper bleaching D) rubber compounds E) plastic manufacturing