Researchers Combined Two Yeast Strains of Opposite Mating Type; the a Strain

question 4

Multiple Choice

Researchers combined two yeast strains of opposite mating type; the a strain was resistant to chloramphenicol and the ? strain was sensitive to chloramphenicol. The diploid progeny were allowed to undergo several cell divisions, and then the cells were replica plated on glycerol medium with and without chloramphenicol.
-What results would you expect if mitochondria are inherited biparentally?

• A)Some, but not all, yeast colonies found on the plate without chloramphenicol will also grow on the plate with chloramphenicol.
• B)All of the yeast colonies on the plate without chloramphenicol will also grow on the plate with chloramphenicol.
• C)Many yeast colonies will grow on the plate without chloramphenicol and no colonies will grow on the plate with chloramphenicol.
• D)No colonies will grow on either plate.

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Definitions:

Classical Conditioning

A learning process that occurs through associations between an environmental stimulus and a naturally occurring stimulus, leading to a learned response.

Conditioned Response

A learned reaction to a conditioned stimulus that occurs because of prior conditioning.

Conditioned Stimulus

A previously neutral stimulus that, after becoming associated with an unconditioned stimulus, eventually triggers a conditioned response.

Neutral Stimulus

A stimulus that initially produces no specific response other than focusing attention.