The recessive mutant allele that causes cystic fibrosis is much more frequent in Caucasians population than in other world populations. Some scientists believe heterozygotes must have had a survival advantage during plagues such as cholera that occasionally swept through this population. What concept does this illustrate?

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#Question id: 2624

#Unit 2. Cellular Organization

What is negative regulation of lac operon

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#Question id: 21809

#Unit 12. Applied Biology

Which one of the following sensors measures the potential current?

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#Question id: 23350

#General Aptitude

Decoding is associated with

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#Question id: 4931

#Unit 11. Evolution and Behavior

During course of evolution first prototroph was anoxygenic?

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#Question id: 19885

#Unit 13. Methods in Biology

The plasmid used by Cohen and Boyer fr their transformation experiment was