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: 19938

#XL - P Chemistry

The number of electrons that can be accommodated in d_xy orbital is

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#Question id: 9616

#XL - S Microbiology

Which mutation should least require realignment of homologous regions of a gene that is common to several related species?

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#Question id: 19500

#XL - P Chemistry

Principal, Azimuthal and magnetic quantum numbers are respectively related to:

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#Question id: 12913

#XL - S Microbiology

________  involves the size analysis of restriction fragments produced by several restriction enzymes individually and in combination. 

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#Question id: 3789

#XL - Q Biochemistry

What do telomeres do?