In an Imagined Transduction Experiment with Alleles A⁺, B⁺, and C⁺

Multiple Choice

In an imagined transduction experiment with alleles a⁺, b⁺, and c⁺, a⁺ alone was transduced into an auxotroph 1400 times, b⁺ alone 1200 times, and c⁺ alone 970 times. Genes a⁺ and b⁺ were both found 10 times, b⁺ and c⁺ 2 times, and a⁺ and c⁺ one time. What can you conclude?

A) Cotransduction is too infrequent to be used to map genes.
B) Genes a and c cotransduce only accidentally.
C) Genes a and b are more closely linked than a and c or b and c.
D) Genes a and c are found together only if double crossovers have occurred.
E) Transduction of gene c is very rare.