In Drosophila, Mutation Screening Usually Involves Use of a Balancer

question 3

Multiple Choice

In Drosophila, mutation screening usually involves use of a balancer chromosome that includes three elements: a set of overlapping inversions, an easily recognized dominant mutation, and a recessive lethal mutation that prevents balancer homozygotes from surviving. Which one, or combination, of these elements is necessary and sufficient to suppress crossovers?

• A)inversions
• B)dominants
• C)lethal recessive
• D)inversions plus dominant
• E)lethal plus inversions

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Definitions:

Substitution Effect

The change in quantity demanded of a good due to a change in its price, leading consumers to switch to or from substitute products.

Higher Wage

A wage rate that is above the average or minimum level commonly paid for similar work.

Wage Discrimination

Unequal pay for workers who perform similar jobs or duties, often based on gender, race, age, or sexual orientation.

Marginal Productivity

The increase in output produced by adding one more unit of a specific input, keeping all other inputs constant.