Positive Selection Increases the Frequency of an Allele (Until It

question 109

Multiple Choice

Positive selection increases the frequency of an allele (until it goes to fixation) and negative selection decreases the frequency of an allele (until it is eliminated) . What is the long-term fate of either allele of a gene with two alleles in which the fitness of the heterozygote is superior to that of both homozygotes?

• A)One allele will eventually go to fixation because it is still more favored than the other with the given selective environment.
• B)Both alleles will remain in the population because heterozygote gametes will form with each allele in a separate gamete.
• C)Heterozygote advantage will continue until the frequency of both alleles is equal to 0.5.
• D)One of the alleles will eventually be lost because selection will favor the other allele.

Differentiate between primary and secondary succession and factors influencing each.

Understand the role of nitrogen-fixing plants in ecosystems.

Understand the concept of biodiversity at various levels and its implications for community structure.

Describe the process and effects of succession on ecosystems.

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Definitions:

Illusory Correlation

refers to the cognitive bias where a relationship between two variables is perceived to exist when no such relationship actually exists.

Double-Blind Procedure

A experimental setup in which neither the participants nor the experimenters know who is receiving a particular treatment, preventing bias in the results.

Illusory Correlation

The cognitive bias of perceiving a relationship between two variables even when no such relationship exists.

Placebo Effect

A phenomenon in which a person experiences a physiological or psychological improvement after receiving a treatment with no therapeutic value.