A Restriction-Fragment Length Polymorphism at a Site in the X

question 26

Multiple Choice

A restriction-fragment length polymorphism at a site in the X chromosome has three alleles, A₁, A₂, and A₃. The gel below is the DNA fingerprint for two girls who have the same parents. What is the genotype of the mother? Of the father?

• A)A₁/A₂; A₃
• B)A₁/A₃; A₂
• C)A₂/A₃; A₁
• D)A₂/A₃; A₂
• E)A₂/A₃; A₃

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Definitions:

Conditioned Stimulus

In classical conditioning, a previously neutral stimulus that, after becoming associated with the unconditioned stimulus, triggers a conditioned response.

Neutral Stimulus

A stimulus that initially produces no specific response other than focusing attention, until it is paired with an unconditioned stimulus.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with the unconditioned stimulus, eventually comes to trigger a conditioned response.

Unconditioned Stimulus

In classical conditioning, a stimulus that naturally and automatically triggers a response without any prior learning.