The Following Graphs Show the Frequency of the B+ Allele

question 50

Multiple Choice

The following graphs show the frequency of the b+ allele over 20 generations in two populations of heterozygous flour beetles (data for a population of 10 individuals is shown in graph A; data for a population of 100 individuals is shown in graph B) . Why does the frequency of the b + allele increase in both populations?

• A) b+ is a lethal allele.
• B) b+ is a balanced polymorphism.
• C) b+ is a fixed allele.
• D) b+ allele is adaptive.
• E) b+ is a neutral mutation.

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Definitions:

Law of Large Numbers

A statistical principle that states that as a sample size grows, its mean gets closer to the average of the whole population.

Blood Type

A method of classifying blood by examining the presence or lack of certain inherited antigenic substances on red blood cell exteriors.

Joint Frequency Distribution

A statistical representation showing the frequency of occurrences for combinations of two or more categories or variables.

Blood Type B

A blood group classification determined by the presence of antigen B on the surface of red blood cells.