A Competent Bacterial Strain with Genes A, B, and C $a$

question 12

Multiple Choice

A competent bacterial strain with genes a, b, and c is transformed by a donor bacterial fragment. Cotransformation frequencies for each gene pair are as follows: $a$ and $b \quad 0.04 \%$
$a$ and $c \quad 0.02 \%$
$b$ and $c \quad 0.0064 \%$ Which conclusion can be definitively made from this data?

• A) Cotransformation of b and c is so frequent, they must be one gene.
• B) Gene b is closer to c than to a.
• C) Gene a is closer to c than to b.
• D) Gene order is a, b, then c.
• E) Genes b and c are farthest apart.

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Definitions:

Carbon Dioxide

A colorless, odorless gas produced through cellular respiration and combustion, utilized by plants in photosynthesis to produce oxygen.

Sinusitis

Inflammation of the cranial sinuses in the head.

Otitis Media

An inflammation of the middle ear, typically associated with fluid buildup and often causing earache and temporary hearing loss.

Bronchitis

An inflammation of the lining of the bronchial tubes, which carry air to and from the lungs, often resulting in coughing and difficulty breathing.