Suppose That You Examine a Vial of 100 Flies That

question 65

Multiple Choice

Suppose that you examine a vial of 100 flies that are all offspring from a single genetic cross, and you find only red-eyed females and red-eyed males present. You allow these flies to interbreed, and in the next generation you find all the females are red-eyed, but you find both red-eyed and white-eyed males. The allele for red eye colour (X^w+) is dominant over the allele for white eye colour (X^w) . Which of the following best describes the genotypes of the original parents?

• A) X^w+X^w+; X^wY
• B) X^w+X^w; X^w+Y
• C) X^w+X^w; X^wY
• D) X^wX^w; X^w+Y

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Definitions:

Conditioning Stimulus

A neutral stimulus that, when paired with an unconditioned stimulus, leads to a conditioned response through the process of classical conditioning.

Behavioral Contrast

The phenomenon where the rate of response varies according to a change in reinforcement conditions for another behavior.

Hourly Rate

A payment rate set for one hour of work, often used to calculate wages for part-time or freelance employment.