An Hfr Strain of E

question 43

Short Answer

An Hfr strain of E.coli with the genotype a^+b+c+d+e+f+ is mated with an F^- auxotrophic strain with the genotype a^-b-c-d-e-f-.Conjugation is stopped at 10-minute intervals and the genotypes of the resulting conjugants are determined.The following results are obtained:
After 10 minutes e⁺
After 20 minutes a^+e+
After 30 minutes a^+b+e+
After 40 minutes a^+b+d+e+
After 50 minutes a^+b+c+d+e+
After 60 minutes a^+b+c+d+e+f+
What is the correct order of genes on this bacterial chromosome?

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Definitions:

Stepwise Regression

A regression analysis technique where an automatic process is used to select the predictive variables.

Preliminary Tool

An initial instrument or technique used in the early stages of research to help gather data, assess theories, or guide a study's direction.

Large Number

A numerical value that is significantly higher than most common numbers in a given context, often beyond simple counting or immediate comprehension.

Qualitative Variable

A variable that represents types or categories rather than numerical values.