From One F⁺ strain,three Distinct Hfr Strains Were Derived

question 39

Multiple Choice

From one F⁺ strain,three distinct Hfr strains were derived.The first three markers transferred during an Hfr X F^- cross (different for each of the three Hfr) are:
Hfr 1: ...D A →
Hfr 2: ...E B →
Hfr 3: ...E C D →
Which of the following must be the order of the genes on the bacterial chromosomal circle? (A is shown at both ends to represent circularity.Assume that the Hfr picks up all intermediates between any two represented genes.)

• A)A D C E B F A
• B)A B C D F E A
• C)A C D F E B A
• D)A E F B C D A
• E)A F B D E C A

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Definitions:

Pronoun Case

The grammatical category of pronouns based on their function in a sentence, including subject, object, and possessive cases.

Incorrect Case

The use of a wrong form of a noun, pronoun, or adjective in a sentence, based on grammatical rules of languages that have case distinctions.

Dangling Modifier

A word or phrase that modifies a word not clearly stated in the sentence, often leading to confusion or a humorous misinterpretation.

Modifier

A word, phrase, or clause that qualifies or describes another word, phrase, or clause, altering its meaning.