All of the Following Are Drawbacks Associated with the DNA

question 86

Multiple Choice

All of the following are drawbacks associated with the DNA evidence of tracing African origins except:

• A)scientists assume the DNA is originating in Africa and migrating out,but it could also be migrating into Africa.
• B)mtDNA is not always passed from mother to child;sometimes,it skips a generation.
• C)scientists assume that selective pressures do not affect the DNA,but there is evidence for selective pressure on mtDNA.
• D)both models suggest steady rates of mutation,and mutation is notoriously uneven.
• E)mtDNA studies exclude information carried on the Y chromosome.

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Definitions:

Fear of Public Speaking

A common form of anxiety where an individual feels an intense fear of performing or speaking in front of an audience.

Aversive Conditioning

A behavioral training process that uses negative stimuli to reduce the occurrence of certain undesirable behaviors.

Smoking

The act of inhaling and exhaling the smoke of tobacco or a drug, which can lead to health issues and addiction.

Cognitive Therapies

Treatments emphasizing that cognitions (thoughts) are the main source of psychological problems; therapies that attempt to change the individual’s feelings and behaviors by changing cognitions.