The ability of F+ cells, or Hfr cells, to transfer plasmid DNA to an F- cell is properly called: transversion transformation conjugation transduction transition
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.
The ability of F+ cells, or Hfr cells, to transfer plasmid DNA to an F- cell is properly called:
- transversion
- transformation
- conjugation
- transduction
- transition
The transmission of the gene between different organisms is known as gene transfer. Gene transfer can be horizontal or vertical. The transfer of the gene from parents to progeny is known as vertical gene transfer. Horizontal or lateral gene transfer is the transmission of the gene between different genomes or different species. Horizontal gene transfer in bacteria takes place with plasmid, transposons, and bacteriophages, and this transfer can be by methods like transduction, conjugation, and transformation.
The transfer of genome by plasmids or transposons via temporary union between two bacteria is known as conjugation. The bacteria containing a plasmid with fertility factor(F plasmid) is known as F+ bacteria or donor bacteria. F plasmid consists of genes that should be transferred to bacteria without plasmid (F- cell) or recipient bacteria. High-frequency recombination (Hfr) cells are F+ cells that integrate F plasmid within-host chromosomal DNA.
Thus, option (3) is the correct answer.
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