Number of colonies Number Drugs added Drugs added of colonies None 50 10,000 1155 ВС A BD 48 В 1147 CD 785 1162 АВС 31 D 1140 ABD 43 АВ 47 АCD 631 AC 641 ВCD 35 AD 941 АВCD 29
Genetic Recombination
Recombination is crucial to this process because it allows genes to be reassorted into diverse combinations. Genetic recombination is the process of combining genetic components from two different origins into a single unit. In prokaryotes, genetic recombination takes place by the unilateral transfer of deoxyribonucleic acid. It includes transduction, transformation, and conjugation. The genetic exchange occurring between homologous deoxyribonucleic acid sequences (DNA) from two different sources is termed general recombination. For this to happen, an identical sequence of the two recombining molecules is required. The process of genetic exchange which occurs in eukaryotes during sexual reproduction such as meiosis is an example of this type of genetic recombination.
Microbial Genetics
Genes are the functional units of heredity. They transfer characteristic information from parents to the offspring.
A bacterial transformation is performed with a donor
strain that is resistant to four drugs, A, B, C, and D, and a
recipient strain that is sensitive to all four drugs. The resulting recipient cell population is divided and plated onmedia containing various combinations of the drugs.
The following table shows the results.a. One of the genes is distant from the other three, which
appear to be closely linked. Which is the distant gene?
b. What is the likely order of the three closely linked
genes
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