In Guppies, Fan Tail Is Dominant to Flesh Tail, and Rainbow

question 83

Multiple Choice

In guppies, fan tail is dominant to flesh tail, and rainbow color is dominant to pink. F₁ female guppies are crossed with flesh-tailed, pink-colored males, and the following progeny are observed: 401 fan-tailed, pink-colored; 399 flesh-tailed, rainbow-colored; 98 flesh-tailed, pink-colored; and 102 fan-tailed, rainbow-colored guppies. Assuming that the F₁ female guppies have both dominant alleles on one chromosome, the map distance between these two genes is

• A) 80 cM.
• B) 25 cM.
• C) 0.8 cM.
• D) 20 cM.
• E) None of the above

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Definitions:

Gram-negative

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Gram-positive

Bacteria that retain the crystal violet stain used in the Gram staining method, indicating a single thick cell wall, which is important in classifying bacteria and determining appropriate antibiotics.

Enteric Bacterium

Any bacterium that inhabits the intestinal tract, often referring to those that are part of the gut flora or pathogens causing gastrointestinal diseases.

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