The sharp reduction of the gene pool and the
numbers of a population through a severe
epidemic is an example of
a. natural selection.
b. genetic isolation.
c. the bottleneck effect.
d. the founder effect.
e. all of these.
C
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What type of thinking is required?
What will be an ideal response?
According to the out-of-Africa hypothesis for the evolution of Homo sapiens, modern humans evolved in Africa, Asia, and Europe simultaneously.
Indicate whether the statement is true or false.
One consequence of the lack of introns in bacterial genes is that
A) exons are eliminated during transcription. B) a 5' cap and poly (A) tail can be added immediately. C) bacterial proteins are very short and not subject to mutation. D) translation can begins before transcription is complete because prokaryotes do not have a nucleus. E) integrated viral DNA is not recognized for transcription.
Controversy has arisen about using genetically engineered bovine growth hormone to increase milk yield in cattle. The lesson gained from this controversy is that
A) recombinant DNA technology is inherently a bad idea and should be abandoned. B) humans are not wise enough to use this technique properly. C) the whole human society should decide the proper uses of recombinant DNA technology. D) society should let scientists decide the proper uses of recombinant DNA technology. E) citizens should not be allowed to decide such issues, as they tend to make decisions based on emotion.