Present a rationale for using DNA sequence polymorphisms as an index of genetic diversity
What will be an ideal response?
It is natural to expect that the forces that bring about speciation are dependent upon reproductive isolation. As groups of organisms become reproductively isolated (whether through development of geographic or genetic barriers), it is natural to expect that through the accumulation of mutations, DNA sequences will diverge. It is also natural to expect that some DNA sequences will diverge more rapidly than others and that some differences in DNA sequences may be more evolutionarily important than others. Therefore, while there may be a general relationship between genetic diversity and evolutionary (phylogenetic) diversity, it is likely that there are exceptions.
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What is the best way to describe our current understanding of the one-gene/one-polypeptide hypothesis?
A. It continues to be an accurate description of how genes work. B. It is oversimplified, especially in eukaryotes. C. It has been replaced by the more accurate “one-gene/one-enzyme” hypothesis. D. It was true for fungi like Neurospora, but not for other species.
The env gene of the HIV genome encodes:
A. reverse transcriptase. B. integrase. C. capsid. D. matrix. E. surface glycoprotein.
Plants make ____, which are similar to female sex hormones in mammals but have nothing to do with sexual
reproduction in plants. a. estrogens b. phytoestrogens c. auxins d. cytokinins e. gibberellins
As more is learned about cancer, it has become clear that cancer, with few exceptions, ________
A) is only dependent on the inherited genetics B) is a result of genetics and environmental factors C) has no genetic basis D) is 100% dependent on inherited genetics