Chlamydomonas, Although a Green Algae, Is Sensitive to an Antibiotic

question 22

Multiple Choice

Chlamydomonas, although a green algae, is sensitive to an antibiotic, erythromycin. If mt^- mating-type alga that is sensitive is mated with an mt⁺ cell that is resistant, and if the mt⁺ strain donates chloroplasts, what results do you expect and why?

• A)All progeny are sensitive because sensitivity is the dominant trait.
• B)Approximately half the progeny are sensitive because this is the recessive trait.
• C)All the progeny are sensitive because this is the recessive trait.
• D)All progeny are resistant because cpDNA is responsible.
• E)Approximately half the progeny are sensitive because cpDNA is responsible.

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