In E Coli, a P1 Generalized Transduction Was Carried Out Using

question 55

Multiple Choice

In E. coli, a P1 generalized transduction was carried out using a donor strain of ara⁺ leu⁺ ilvH⁺ genotype. The recipient strain was ara^- leu^- ilvH^-. 381 ara⁺ transductants were first recovered and then the remaining genotypes of these 381 were determined and the results are shown below: $$\begin{array} { l } \mathrm { ara } ^ { + } \text {leu}^-{ ilvH }^- \quad = 32 \\\mathrm { ara } ^ { + } \mathrm { leu } ^ { + } i \mathrm { lv } \mathrm { H } ^ { - } = 9 \\\mathrm { ara } ^ { + } \operatorname { leu }^- i \mathrm { lv } \mathrm { H } ^ { + } = 0 \\\mathrm { ara } ^ { + } \mathrm { leu } ^ { + } \mathrm { llv } \mathrm { H } ^ { + } \quad = 340 \\\end{array}$$ Which gene is in the middle?

• A) ara
• B) leu
• C) ilvH
• D) ara or ilvH
• E) leu or ara

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Definitions:

Critical Value

A point on the test statistic distribution that is compared to the test statistic to determine whether to reject the null hypothesis.

Degrees of Freedom

The count of autonomous figures or measurements that may change in an examination while still adhering to all restrictions.

Null Hypothesis

The default hypothesis that there is no significant difference or effect, usually to be tested against an alternative hypothesis.

Expected Frequency

The anticipated count of occurrences across different categories in a contingency table under the null hypothesis.