A geneticist isolates two bacteriophage r mutants (r13 and r2) that cause rapid lysis. He carries out the following crosses and counts the number of plaques listed here: Number Genotype of parental phage Progeny of plaques h* r13 xh r13* h* r13* h r13 104 h* r13 110 h r13 Total 216 h* r2 xh r2* h* r2* h r2* 86 h* r2 81 hr2 Total 180
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.
Calculate the recombination frequencies between r2 and h and between r13 and h.
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